Sanz, Macarena G.; Sellon, Debra C.; Cary, Julie A.; Hines, Melissa T.; Farnsworth, Kelly D.
(American Veterinary Medical Association, 2009-11)
OBJECTIVE: To compare the analgesic efficacy of administration of butorphanol tartrate,
phenylbutazone, or both drugs in combination in colts undergoing routine castration.
DESIGN: Randomized controlled clinical ...