Effect of terbutaline and metaproterenol (two beta-adrenergic agonists) on performance and carcass composition of culled Moghani ewes

Abstract The effects of terbutaline (T), metaproterenol (M) and low energy diet (LE) on growth performance and carcass composition were evaluated in 72 Moghani culled ewes. Terbutaline and metaproterenol, each one at the doses of 0, 5, 10 and 20 mg/kg DM (C, T5, T10, T20, M5, M10 and M20, respectively) were added to the diet (ME: 2.9 Mcal/kg DM) of seven groups of 63 culled ewes and the other group was fed on LE (ME: 2.5 Mcal/kg DM) for the final 8 weeks of the fattening period. M10 and M20 equally increased ( p p p p p p p