Mammary Glands of Sheep and Goats

The udders of the ewe and the doe differ from that of the cow in that each half of the udder has only one teat, one streak canal, one teat cistern, and one gland cistern. One half of the ovine and caprine udder resembles one quarter of the bovine udder. The teat is sparsely covered with fine hair. Each half of the udder of the ewe is craniomedial to the inguinal sinus (a pouch of skin lined with scent glands) of the same side. supernumerary teats in the ewe do not appear to have separate gland tissue, as is fre­quently found in the cow. The sphincter muscle around the papillary duct is poorly developed, so closure is affected by elastic tissue in the end of the teat.