Effect of Bromocriptine and Nano-Bromocriptine on Egg Quality Parameters of Late Laying Hens

Abstract

Corresponding Author: Ahmed Dawod Department of Husbandry and Animal Wealth Development, Faculty of Veterinary Medicine, University of Sadat City, Menofia, Egypt Email: adawod280@gmail.com Abstract: The study was conducted to determine the effect of bromocriptine and nano-bromocriptine on external and internal egg qualities of late laying hens. A total of 150 Novo-gene brown strain hens of 70 weeks of age were selected from a commercial laying farm. The birds were divided randomly into three groups, with 50 birds in each. The first group was given saline and kept as control, while the second and third groups were given bromocriptine (2-bromoalpha-ergocriptine) and nano-bromocriptine, respectively. Each group was separated into two subgroups of equal number, the first receiving the treatment orally and the second receiving the treatment via subcutaneous injections at a dose of 100 microg/kg body weight/ week. During experimentation, five eggs were taken every 4 weeks from each subgroup to determine the internal and the external egg qualities. Results revealed that Administration of either bromocriptine or nano-bromocriptine increased significantly the egg weight, egg length, yolk height, yolk weight, yolk width and thick albumin height. The findings conclude that bromocriptine and nano-bromocriptine treatment could be used for the late laying hens to improve the internal and external qualities of eggs.