The objective of this study was to evaluate, in farms, the trans and postoperative periods of teaser bulls prepared by the surgical techniques of lateral deviation of prepuce and penis (lateral deviation) and lateral deviation with a fixation of the preputial mucosa to a new orifice (new orifice), using as tranquilizer xylazine or xylazine/acepromazine association, added of local anesthesia. 156 bulls, at 12 to 18 months of age were used; 108 bulls were submitted to lateral deviation of prepuce and penis and 48 to new orifice. The bulls were casually allocated in two groups composed by 78 animals (a group receiving only xylazine, another group receiving xylazine/acepromazine association, both receiving local anesthesia with lidocayne 2%). The bulls were weekly appraised, by thirty days. Xylazine/acepromazine association resulted in postoperative complications in 72 animals (92,31%) and xylazine resulted in postoperative complications in 29 animals (37,18%). The chi² test showed that Xylazine/acepromazine association resulted in increase of postoperative complications.
teaser bulls; xylazine; acepromazine; postoperative
