Effects of shallow scoop and deep scoop dehorning on plasma cortisol concentrations in calves.
Scoop dehorning is one method of horn amputation. Plasma cortisol concentrations were used to investigate the effects of wound depth caused by shallow scoop and deep scoop dehorning on the acute pain-induced distress experienced by 15 week-old calves during the first 9 hours following horn amputation. Shallow scoop and deep scoop dehorning caused a prolonged cortisol elevation which returned to control values within 8 hours and 6 hours, respectively. There were no significant differences between shallow and deep dehorning with regard to mean plasma cortisol concentrations and integrated cortisol responses during the 9 hours after dehorning. Linear regression analysis revealed no significant correlation between wound depth and integrated cortisol response. Hence, at the investigated scoop wound depths, there was no detectable benefit in implementing a shallow scoop strategy in order to reduce acute pain-induced distress caused by scoop dehorning in 15 week-old calves.
McMeekan
C M
CM
Department of Physiology and Anatomy, Massey University, Private Bag 11-222, Palmerston North, New Zealand.
Mellor
D J
DJ
Stafford
K J
KJ
Bruce
R A
RA
Ward
R N
RN
Gregory
N G
NG