The effect of repeated doses of toltrazuril on coccidial oocyst output and weight gain in suckling lambs.

Coccidial oocyst output and liveweight were monitored in 43 pairs of lamb twins over a 10-week period during September-November 1992. One of each set of twins was treated orally with toltrazuril (20 mg/kg) weekly while the other was an untreated control. The oocyst output was significantly lower (P < 0.01) and the weight gain over the trial period was significantly greater (P < 0.05) in the treated group than in the control group.