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Twin Calves Wanted
For Research
Identical twin female dairy calves are needed by the U. S. Department of Agriculture scienr tists for use in management and nutrition studies at die Agricultural Research Center, Beltsville, Maryland.
The calves, being sought primarily within a 25(Hnile radius of Washington, D. C., can be either purebred or high-grade animals of the five major dairy breeds. They can be of any age up to 20 months.
Owners willing to sell identical twin heifer calves are requested to write Dr. R. D. Plowman, Dairy Cattle Research Branch, Animal Husbandry Research Division, Beltsville, Md. An inspector will be sent to check the calves before purchase.
Identical twin calves are rare. They develop from a single cell and are always the same sex. The twins look very much alike and react- in much the same manner. Their markings often are repeated on the same or opposite sides.
Identical twin calves are useful in research because of their similar physical reactions Farperiments with a single pair give results as reliable as tbbse from rests made; with several animals less closely related.
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