The onset of pain related behaviours following partial beak amputation in the chicken
@article{Gentle1991TheOO, title={The onset of pain related behaviours following partial beak amputation in the chicken}, author={M. Gentle and L. N. Hunter and D. Waddington}, journal={Neuroscience Letters}, year={1991}, volume={128}, pages={113-116} }
The number of pecks delivered by birds to an attractive visual stimulus was measured before and again 6, 26 and 32 h after partial beak amputation. There was a significant reduction in the number of pecks by birds 26 h after amputation but not at 6 h after. This reduction was considered to be a quantitative measure of pain related guarding behaviour. The results indicated the presence of a pain-free period immediately following amputation which may last in some birds for as long as 26 h.
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