Abstract
Levels of 2, 3, 4, 5 or 6 mg. of stilbestrol were found to significantly increase rate of gain and feed efficiency of fattening lambs. Carcass yield was not affected by stilbestrol treatment. Carcass grade of the stilbestrol-implanted lambs tended to be slightly lower than those of the control lambs. Extreme enlargement of the accesory sex glands of all of the wether lambs was noted at the time they were slaughtered. During the feeding period one lamb receiving 2 mg. of stilbestrol and two lambs receiving 6 mg. of stilbestrol developed complete blockage of the urinary tract. Implantation of 25, 50, 100 or 200 mg. of nor-testosterone resulted in no increase in rate of gain. No effect was noted on carcass grade or yield or on the accessory sex glands from this treatment. Copyright © . .