Beta-adrenergic agonists cause a shift in carcass composition of poultry, pigs, cattle and sheep. Fat content is dramatically reduced in favour of a higher percentage of muscle. Carcass yield is usually enhanced and is accompanied by muscle hypertrophy. There is a tendency for an improved growth rate and feed conversion in poultry and ruminants. In pigs, only feed conversion was positively affected.
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L. O. Fiems (1987) studied this question.