Effects of laser beak trimming on the development of brown layer pullets
Petrolli, T. G; Petrolli, O. J; Girardini, L. K; Zotti, M. L. A. N; Baggio, R. A; Junqueira, O. M.
R. bras. Ci. avíc.;
19(1): 123-128, jan.-mar. 2017. tab, graf
Artigo
em Inglês
| VETINDEX
| ID: vti-688264
Resumo
Laser beak trimming is a promising alternative to conventional hot-blade beak trimming as it is less painful and provides better beak uniformity and better animal welfare. In this study, laser vs. hot-blade beak trimming were compared in 400 Hy-line Brown pullets between 2-16 weeks of age. At 7 days of age, birds were distributed according to a completely randomized design into two treatments, with 10 replicates (pens) of 20 birds each. Birds and feed offer and residues were weekly weighed to determine weight gain, feed intake, and feed conversion ratio. In weeks 4, 8, 12, and 16 weeks, one bird per experimental unit was sacrificed to measure the development of the heart development, liver, proventriculus, gizzard, small intestine, and bursa. And of the oviduct in week 16. Pullers submitted to laser beak trimming presented higher weight gain and weekly feed intake, and better feed conversion ratio during the evaluated period. There was no influence of beak trimming methods on the development of the digestive organs, bursa or oviduct. Laser beak trimming can be used as an alternative to hot-blade beak trimming of commercial brown layers.(AU)
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BR68.1
Localização: BR68.1
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