J. Anim Sci.
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J. Anim Sci. 1970. 30:970-973.
© 1970 American Society of Animal Science
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Influence of Delayed Castration and of Diethylstilbestrol Implantation on the Performance of Suckling Lambs1

R. H. Simms2,3,, T. W. Perry and F. N. Andrews

Purdue University, Lafayette, Indiana

Abstract

Research at various experiment stations previously bas demonstrated the growth stimulatory effect of diethylstilbestrol (DES) when subcutaneously implanted in either the suckling female or the castrate-male lamb. Also, a significant increase in the efficiency of feed conversion has been reported (Andrews, Beeson and Harper, 1949; Andrews and Beeson, 1953; Butcher and Raleigh, 1962; Jordan, 1950; Pope et al., 1951; O'Mary et al., 1952; Galloway et al., 1952; Means, Andrews and Beeson, 1953; Clegg and Cole, 1954; Clegg et al., 1955; Bell, Smith and Erhart, 1954; Whiting, Clark and Allen, 1954; Wilkinson et al., 1955). Garrett (1964) and Troelsen and Myhr (1966) reported inconsistent results from DES implants. Although Jordan and Dinusson (1950) were unable to stimulate gain in suckling lambs with stilbestrol, Perry, Andrews and Beeson (1951) reported a highly significant increase in the daily gain of suckling lambs (ewes and castrate-males) on pasture following DES implantation at levels of 12 or 24 milligrams.

Footnotes

1 Department of Animal Sciences Journal Paper No. 3855. Purdue University Agricultural Experiment Station.

2 The data are from a thesis submitted by the senior author to the Graduate School, Purdue University, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.

3 Present address: University of Illinois, Division of Extension, Box 189, Macomb, 61455.






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