Translational Animal Science最新文献

{"title":"Effects of dietary acidifiers and other low acid-binding capacity formulation strategies on weanling pig growth performance and fecal dry matter.","authors":"Ethan B Stas, Mike D Tokach, Jason C Woodworth, Joel M DeRouchey, Robert D Goodband, Jordan T Gebhardt","doi":"10.1093/tas/txaf104","DOIUrl":"10.1093/tas/txaf104","url":null,"abstract":"<p><p>Two experiments were conducted to determine effects of dietary acidifiers and low acid-binding capacity at a pH of 4 (ABC-4) formulation strategies on weanling pig performance and fecal dry matter (DM). In Exp. 1, 300 pigs, initially 6.1 kg, were allotted to 1 of 6 dietary treatments fed in two phases with 5 pigs per pen and 10 replications per treatment. Treatment diets were formulated using four acidifiers to target an ABC-4 of 200 and 250 meq/kg in phases 1 and 2, respectively. The acidifiers included fumaric acid (Primary Products Ingredients Americas LLC, Decatur, IL), Activate DA (Novus, St. Charles, MO), KEM-GEST (Kemin, Des Moines, IA), and ACID-AID (Alltech, Nicholasville, KY) added at 0.36, 0.87, 1.01, and 0.84% of the diet, respectively. The fifth treatment did not contain acidifiers which increased the ABC-4 value of the diet by 40 meq/kg. The last treatment was the same formulation as the diet without acidifiers, but with the addition of pharmacological levels of Zn from ZnO. From d 0 to 24 and d 0 to 38, pigs fed low ABC-4 diets had increased (<i>P </i>≤ 0.020) G:F compared to pigs fed the high ABC-4 diet. In Exp. 2, 725 pigs, initially 5.9 kg, were allotted to 1 of 5 dietary treatments fed in two phases with 5 pigs per pen and 29 replications per treatment. Three treatments were formulated using 0.46% fumaric acid with an additional low ABC-4 formulation strategy to target the same low ABC-4 level as Exp. 1. The three strategies consisted of low Ca levels, 0.6% formic acid (Amasil NA; BASF; Florham Park, NJ), or replacing whey permeate with crystalline lactose. The fourth treatment was formulated to be 100 meq/kg greater than the low ABC-4 diets. The final treatment was the same formulation as the high ABC-4 diet but with the addition of pharmacological levels of Zn. From d 0 to 24 and d 0 to 38, pigs fed the crystalline lactose diet had decreased (<i>P </i>< 0.05) ADFI compared to the other low ABC-4 formulation strategies. Pigs fed low ABC-4 diets had increased (<i>P </i>≤ 0.024) G:F and fecal DM compared to the 100 meq/kg higher ABC-4 diet. From d 0 to 24, pigs fed the diet containing ZnO had increased (<i>P </i>≤ 0.001) ADG and ADFI compared to the high ABC-4 diet without ZnO. In summary, the combination of fumaric and formic acid had the best performance among low ABC-4 formulation strategies, with pigs fed low ABC-4 diets having improved feed efficiency and fecal DM compared to a higher ABC-4 diet when the diets did not contain ZnO.</p>","PeriodicalId":23272,"journal":{"name":"Translational Animal Science","volume":"9 ","pages":"txaf104"},"PeriodicalIF":1.8,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12448399/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145113628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Risks and uncertainty associated with prices set by equine boarding facility owners.","authors":"Jada M Thompson, Michelle L Kibler, Jennie L Z Ivey","doi":"10.1093/tas/txaf107","DOIUrl":"10.1093/tas/txaf107","url":null,"abstract":"<p><p>Equine boarding facilities provide critical care for a large portion of the U.S. equine population, yet rising input costs challenge facility owners' ability to maintain services without adjusting fees. Understanding how facility owners perceive boarders' willingness to pay (WTP) for increased boarding costs is essential for balancing equine welfare with business sustainability. This study aimed to 1) assess equine facility owners'/managers' perceptions of how boarders would respond to increased boarding rates, and 2) identify factors influencing those perceptions. A 26-question online survey targeting equine boarding facility owners and managers (n = 112 completed responses) was distributed via Extension channels and social media between July and August 2020. Facility owners reported average monthly board rates and answered a double-bounded dichotomous choice WTP scenario based on a hypothetical increase in care costs. Interval regression analysis was used to estimate perceived WTP, controlling for facility size, boarding type, region, income, and demographic factors. Overall, facility owners perceived that boarders would tolerate a 14.28% (P < 0.01) increase in monthly boarding rates. Full board clients were perceived to have slightly lower WTP (13.42%, P < 0.05); however, due to higher baseline costs, this translated into a greater absolute monthly increase ($69.78) compared to other board types ($34.85). Owners with higher household incomes perceived greater boarder WTP (P < 0.05), while facility size and geographic region were not significant factors. These results suggest that although equine owners may tolerate modest rate increases, larger absolute increases for full board may require additional justification through service value. Understanding owner perceptions of boarder WTP can help boarding facilities make informed pricing decisions that support both business viability and equine welfare.</p>","PeriodicalId":23272,"journal":{"name":"Translational Animal Science","volume":"9 ","pages":"txaf107"},"PeriodicalIF":1.8,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12400024/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144993537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Supplementing yeast culture to beef heifers consuming a forage-based diet.","authors":"Autumn T Pickett, Reinaldo F Cooke, Izadora S de Souza, Willian A de Souza, Guilherme A Monteiro, Mykael B do Prado, Vinícius N Gouvêa, Rafael C Araujo, Shea J Mackey","doi":"10.1093/tas/txaf103","DOIUrl":"10.1093/tas/txaf103","url":null,"abstract":"<p><p>This experiment evaluated the effects of supplementing yeast culture (<b>YC;</b> <i>Saccharomyces cerevisiae</i>) on in situ ruminal degradability, rumen fermentation and microbiota responses of heifers consuming a forage-based diet. Twelve ruminally-cannulated Angus-influenced heifers were ranked by body weight (<b>BW;</b> 180 ± 4 kg) and assigned to 4 groups of 3 heifers each. Groups were enrolled in a replicated 3 × 3 Latin square design containing 3 periods of 21 d and 14-d washout intervals. Groups were assigned to receive no YC (<b>CON</b>), or 1.5 g of YC/100 kg of heifer BW (<b>YC1.5</b>) or 3.0 g of YC/100 kg of heifer BW (<b>YC3.0</b>). During each period, heifers (n = 12/treatment) were housed in individual pens and offered water and bermudagrass hay (<i>Cynodon dactylon</i>) for ad libitum consumption, in addition to 650 g/d (as-fed basis) of a corn-based concentrate. The YC was mixed daily with the concentrate during each period (d 0 to 21). Ruminal in situ disappearance of forage dry matter (<b>DM</b>) and neutral detergent fiber (<b>NDF</b>) were evaluated by incubating polyester bags with 4 g of dietary hay on d 17 for 96 h. Rumen fluid samples were collected on d 0, 8, and 16, in a manner that the final collection (d 16) did not interfere with in situ procedures on d 17. Apparent total-tract digestibility (<b>aTTD</b>) of nutrients was calculated using fecal samples collected every 12-h from d 17 to 21. Data were analyzed using orthogonal contrasts (linear and quadratic) with heifer as the experimental unit. Feed intake was not affected (<i>P </i>≥ 0.14) by treatments. Inclusion of YC linearly increased (<i>P </i>≤ 0.04) propionate and iso-butyrate concentrations in the rumen fluid, and tended (<i>P </i>≤ 0.09) to increase acetate and total volatile fatty acid (<b>VFA</b>) concentrations. Inclusion of YC linearly decreased (<i>P </i>= 0.03) the relative abundance of the bacterial genus <i>Succiniclasticum</i>, and linearly increased (<i>P </i>= 0.04) genera Shannon diversity index in the rumen fluid. Inclusion of YC linearly increased (<i>P </i>≤ 0.05) ruminal disappearance rate of hay DM and NDF, but did not affect (<i>P </i>≥ 0.40) degradability of DM and NDF. Inclusion of YC linearly increased (<i>P </i>≤ 0.05) aTTD of starch and NDF. Inclusion of YC linearly increased (<i>P </i>= 0.04) heifer average daily gain and gain:feed (<b>G:F</b>). Collectively, supplementing 1.5 or 3.0 g of YC/100 kg of BW linearly enhanced utilization of dietary nutrients and production of ruminal VFA in beef heifers consuming a forage-based diet.</p>","PeriodicalId":23272,"journal":{"name":"Translational Animal Science","volume":"9 ","pages":"txaf103"},"PeriodicalIF":1.8,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12416140/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145030694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of processing method of hybrid rye grain on growth performance, dietary net energy utilization, and carcass characteristics of yearling beef steers fed a finishing diet.","authors":"Federico Podversich, Warren C Rusche, Scott L Bird, Zachary K F Smith","doi":"10.1093/tas/txaf102","DOIUrl":"10.1093/tas/txaf102","url":null,"abstract":"<p><p>This experiment evaluated the effects of replacing one-third of corn grain in a finishing diet with rye grain (RG) processed using one of three processing methods. Predominately Angus steers (n = 192, initial shrunk BW = 410 ± 20.9 kg) were blocked by source and pen location and assigned to one of four dietary treatments: dry-rolled corn (DRC), unprocessed RG (UNP), dry-rolled RG (DRR) and hammer-milled RG (HMR). Steers were fed for a total of 147 d. Pen was the experimental unit (6 pens per treatment, 8 steers per pen), and data were analyzed as a randomized complete block design using three contrasts: grain type [DRC vs. (UNP + DRR + HMR)], RG processing (UNP vs (DRR + HMR), and RG processing method (DRR vs HMR). Processing RG increased (<i>P</i> = 0.02) apparent neutral detergent fiber digestibility (aNDFD). Dry-rolling RG increased digestibility of dry matter and organic matter (<i>P </i>≤ 0.02) and tended (<i>P </i>= 0.09) to increase starch digestibility compared to HMR. Dry matter intake (DMI) was unaffected by grain type (<i>P</i> = 0.55) and whether RG was processed (<i>P</i> = 0.27), but processing method affected DMI (<i>P</i> < 0.01; 11.5 and 12.3 kg/d for DRR and HMR, respectively). Grain type did not affect (<i>P</i> = 0.18) gain to feed (G:F). Rye processing tended to increase G:F by 4.4% (<i>P</i> = 0.08), and DRR steers tended to be 4% more efficient than HMR steers (<i>P</i> = 0.10; 0.146 and 0.140, respectively). Observed Net Energy for gain (paNEg) tended to be 3% greater for DRC than steers fed RG (<i>P</i> = 0.09) with RG processing having no effect (P = 0.17). Steers fed DRR tended to have 4.5% greater paNEg than HMR steers (<i>P</i> = 0.06; 1.32 and 1.26 Mcal/kg, for DRR and HMR, respectively). Rye grain processing tended to decrease dressing percentage (<i>P </i>= 0.07) but no other effects on carcass characteristics or USDA grade distributions were observed (<i>P</i> ≥ 0.24). Liver abscess prevalence was unaffected by grain type (<i>P</i> = 0.81) and whether RG was processed (<i>P</i> = 0.77). However, processing method tended (<i>P </i>= 0.08) to influence liver abscess prevalence (78.4% and 91.8% normal livers for DRR and HMR, respectively). Rye grain effectively replaced one-third of DRC in a finishing diet with minor effects on performance or feed efficiency. Processing RG tended to improve efficiency, and using dry-rolling tended to improve feed efficiency compared to hammer-milling under the conditions of this experiment.</p>","PeriodicalId":23272,"journal":{"name":"Translational Animal Science","volume":"9 ","pages":"txaf102"},"PeriodicalIF":1.8,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12416138/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145030641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of medium-chain fatty acid supplementation levels in early nursery diets on growth performance, fecal score, gut permeability, energy status, and apparent total tract digestibility of weaning pigs.","authors":"Jannell A Torres, Madison J Mejia, Chan Ho Kwon, Eva S Safaie, Ellen Davis, Michaela P Metz, Young Dal Jang","doi":"10.1093/tas/txaf109","DOIUrl":"10.1093/tas/txaf109","url":null,"abstract":"<p><p>This study was conducted to evaluate the effects of dietary medium-chain fatty acid (<b>MCFA</b>) levels on growth performance, fecal score, gut permeability, energy status, and apparent total tract digestibility (<b>ATTD</b>) of weaning pigs. At weaning, a total of 100 pigs [18.4 ± 1.8 d of age; initial body weight (<b>BW</b>) of 5.72 ± 1.4 kg] were allotted to 5 treatments in 5 replicates with 4 pigs per pen for a 35-d feeding trial. Treatments were dietary MCFA levels of 0.0, 0.2, 0.5, 1.0, and 1.5% for d 0 to 21 postweaning (Phase 1) replacing soybean oil and a common nursery diet was fed to all pigs for d 21 to 35 postweaning (Phase 2). With increasing dietary MCFA levels, quadratic increases were observed in BW (<i>P</i> ≤ 0.05), average daily gain (<b>ADG</b>; <i>P</i> ≤ 0.05), and average daily feed intake (<b>ADFI</b>; <i>P</i> = 0.08, tendency) in d 0 to 14 postweaning, peaking at the 0.5% MCFA level. The BW from d 21 to 35 postweaning and ADG in d 0 to 21 and 21 to 35 postweaning increased linearly with increasing MCFA levels (<i>P</i> ≤ 0.05), while linear and quadratic increases were observed in overall ADG (<i>P</i> ≤ 0.05), with the greatest value observed at the 1.0% MCFA level. The ADFI increased linearly (<i>P</i> ≤ 0.05) with increasing MCFA levels in d 21 to 35 postweaning and overall period, while gain-to-feed ratio was not different in each phase and overall period. Fecal score was not affected in the overall period (<i>P</i> > 0.21). The ATTD of gross energy (<i>P</i> ≤ 0.05), dry matter (<i>P</i> = 0.10, tendency) and crude protein (<i>P</i> = 0.07, tendency) increased linearly with increasing MCFA levels. At d 7 postweaning, plasma β-hydroxybutyrate levels decreased linearly (<i>P</i> = 0.06, tendency) with increasing MCFA levels, while plasma free fatty acid levels showed a quadratic response (<i>P</i> = 0.06, tendency) with the lowest levels at the 0.5% MCFA level. Increasing MCFA levels decreased plasma diamine oxidase levels at d 7 postweaning (<i>P</i> = 0.06, tendency), while showing quadratic decreases in plasma d-lactate levels at d 7 (<i>P</i> ≤ 0.05) and 21 (<i>P</i> = 0.10, tendency) postweaning, with lower values observed at the 0.2% to 1.0% MCFA levels compared to the 0.0% MCFA level. In conclusion, increasing dietary MCFA levels up to 1.0% enhanced overall growth rate and feed intake, energy and protein digestibility in nursery pigs, improved energy status by lowering plasma β-hydroxybutyrate and free fatty acid levels, and reduced gut permeability in the early nursery period.</p>","PeriodicalId":23272,"journal":{"name":"Translational Animal Science","volume":"9 ","pages":"txaf109"},"PeriodicalIF":1.8,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12400025/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144993549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction to: The impact of hemoglobin concentration on farrowing duration in sows.","authors":"","doi":"10.1093/tas/txaf101","DOIUrl":"https://doi.org/10.1093/tas/txaf101","url":null,"abstract":"<p><p>[This corrects the article DOI: 10.1093/tas/txae158.].</p>","PeriodicalId":23272,"journal":{"name":"Translational Animal Science","volume":"9 ","pages":"txaf101"},"PeriodicalIF":1.8,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12342463/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144837820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of increased standardized ileal digestible lysine through increased soybean meal during late gestation on sow lactation performance.","authors":"Abigail K Jenkins, Jason C Woodworth, Jordan T Gebhardt, Robert D Goodband, Mike D Tokach, Joel M DeRouchey","doi":"10.1093/tas/txaf108","DOIUrl":"10.1093/tas/txaf108","url":null,"abstract":"<p><p>A total of 87 sows (Line 241, DNA) and their offspring were used to evaluate the effects of increasing standardized ileal digestible (SID) Lys in late gestation diets on lactating sow and litter performance. Sows were blocked by parity and body weight (BW) on day 90 of gestation and allotted to one of three treatments with 29 replications per treatment. Diets included increasing dietary SID Lys (0.60, 0.80, or 1.00%) accomplished by increasing soybean meal (14, 21, or 29% of the diet). Sows were allowed 2.04 kg/d of their treatment diet from day 90 of gestation until farrowing for average SID Lys intakes of 11.9, 15.8, or 19.9 g/d. After farrowing, sows had ad libitum access to a common lactation diet containing 1.10% SID Lys. Urine samples were collected on day 90 and 110 of gestation to determine urinary creatinine levels. Litters were cross-fostered within dietary treatment by 48 h after farrowing to equalize litter size. Parity group was included in the statistical model as a fixed effect with classifications of primiparous (n = 35) or multiparous (n = 52) sows. Weight gain from day 90 to 110 of gestation increased (linear, <i>P</i> < 0.001) as SID Lys increased. Change in urinary creatinine level from day 90 to 110 of gestation tended to decrease (linear, <i>P</i> = 0.063) as SID Lys increased suggesting that muscle catabolism decreased with increasing SID Lys. There were no differences in starting litter size or piglet birth weight with increasing SID Lys in late gestation. Piglet average daily gain (ADG) from day 2 to 10 of lactation increased (linear, <i>P </i>= 0.017) as SID Lys increased. From day 2 until weaning, litters from sows fed 15.8 g/d of SID Lys in gestation had the greatest (quadratic, <i>P</i> = 0.044) litter weight gain. Pre-weaning mortality from birth until day 2 of lactation was greatest for sows fed 15.8 g/d of SID Lys (quadratic, <i>P</i> = 0.025). There was a parity group × gestation diet interaction (<i>P</i> = 0.049) for pre-weaning mortality from day 2 to weaning where mortality increased as SID Lys increased in primiparous sows but decreased in multiparous sows. However, the differences in mortality did not influence the number of pigs weaned per treatment. In conclusion, increased SID Lys through increased soybean meal linearly increased late gestation sow BW gain and piglet ADG during early lactation. Litters from sows fed 15.8 g/d of SID Lys had the greatest litter ADG during late lactation and overall.</p>","PeriodicalId":23272,"journal":{"name":"Translational Animal Science","volume":"9 ","pages":"txaf108"},"PeriodicalIF":1.8,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12342966/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144837824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Commercial boar development and management: a review of strategies.","authors":"Ashley R Hartman, Jason C Woodworth, Kara R Stewart, Karol E Fike","doi":"10.1093/tas/txaf096","DOIUrl":"10.1093/tas/txaf096","url":null,"abstract":"<p><p>While boars constitute a relatively small portion (less than 0.005%) of the total swine herd, they have significant genetic influence on the swine population. An individual boar has the potential to sire thousands of offspring every year, yet when it comes to science-based recommendations for boar development from weaning to puberty, there is little in the way of recommendations. Similarly, the management and nutritional recommendations of today's boar population are based on studies that may not be relevant to current genetics or based on recommendations for gilts and sows. Historically with rapid genetic turnover in boar studs there has been little pressure to produce research in this area. However, with boar studs reporting increasing incidence of lameness and health related removals, rising developmental costs, and a need to maintain herd fertility it has created opportunities to increase the scientific understanding of boar development and management. In this literature review, we aim to overview development and management of commercial boars in the United States and highlight what is understood in the way of science-based research.</p>","PeriodicalId":23272,"journal":{"name":"Translational Animal Science","volume":"9 ","pages":"txaf096"},"PeriodicalIF":1.8,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12342469/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144837819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Retraction of: Evaluation of blood urea nitrogen as a new hematologic indicator associated with growth and development in newborn Hanwoo calves.","authors":"","doi":"10.1093/tas/txaf086","DOIUrl":"10.1093/tas/txaf086","url":null,"abstract":"<p><p>[This retracts the article DOI: 10.1093/tas/txae125.].</p>","PeriodicalId":23272,"journal":{"name":"Translational Animal Science","volume":"9 ","pages":"txaf086"},"PeriodicalIF":1.8,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12288641/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144708965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inclusion of calcium propionate in late gestation protein supplements increases subsequent offspring marbling scores in range beef cows.","authors":"Robert L Ziegler, Jacki A Musgrave, Kacie L McCarthy, J Travis Mulliniks","doi":"10.1093/tas/txaf099","DOIUrl":"10.1093/tas/txaf099","url":null,"abstract":"<p><p>A 3-yr study evaluated the effect of late gestation supplementation strategy on cow-calf performance, subsequent steer feedlot performance, and carcass characteristics. Mature March-calving crossbred cows (n = 357) were stratified by body weight (BW) and body condition score (BCS) and assigned to one of 4 treatments: 1) no supplementation (<b>NoSupp</b>), 2) 0.91 kg/d of a 30% CP distillers-based supplement (DBS) (<b>Supp</b>), 3) 0.91 kg/d of a 30% CP DBS with 160 mg/cow/d of monensin (<b>RUM</b>; Rumensin 90, Elanco Animal Health), and 4) 0.91 kg/d of a 30% CP DBS with 40 g/cow/d propionate salt (<b>CaProp</b>, NutroCal 100, Kemin Industries). Cows were individually supplemented daily using a Super SmartFeed (C-Lock Inc., Rapid City, SD) from November to February. After weaning, steers (n = 181) were transported to the West Central Research and Extension Center and placed in a GrowSafe feeding system for finishing. Steers were slaughtered at a commercial facility (Tyson Fresh Meats, Lexington, NE) after fed to a common endpoint each year. Cow BW was not different (<i>P</i> = 0.87) at the initiation of the study in November. However, NoSupp cows were lighter (<i>P</i> < 0.01) at pre-calving and pre-breeding compared to supplemented cows. In contrast, NoSupp cows lost less (<i>P</i> < 0.01) BW from pre-calving to pre-breeding than supplemented cows and gained more (<i>P</i> = 0.01) BW from pre-breeding to weaning. Treatment tended to influence overall pregnancy rates (<i>P</i> = 0.09). Supp and CaProp dams had increased pregnancy rates over NoSupp and RUM (<i>P</i> ≤ 0.05). Offspring from NoSupp dams had lighter (<i>P</i> < 0.01) BW at birth, pre-breeding, and weaning than their counterparts from supplemented dams. In addition, steer feedlot entry, final BW, and hot carcass weight were greater (<i>P</i> < 0.01) when dams were supplemented compared to NoSupp. Steer feedlot average daily gain and gain:feed ratio was not influenced (<i>P</i> ≥ 0.31) by dam supplementation strategies; however, dry matter intake tended (<i>P</i> = 0.09) to be influenced by treatment. Percentage of carcasses grading Choice or greater was not influenced (<i>P</i> = 0.66) treatment; however, steers from dams fed CaProp had increased (<i>P</i> = 0.04) marbling scores. Protein supplementation during late gestation is an effective strategy to increase cow BW, maintain cow BCS, and increase progeny BW. Providing dams with propionate salts during late gestation positively improved marbling score of the subsequent steer carcass characteristics.</p>","PeriodicalId":23272,"journal":{"name":"Translational Animal Science","volume":"9 ","pages":"txaf099"},"PeriodicalIF":1.8,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12311921/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144761446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}