Here are factors you should consider before buying dairy cow Age .Young dairy which have not given birth to more than 4 calves are more productive Healthy. Chosing healthy dairy cow help in increase production and reduce cost in buying drugs and treatment Breed .we have different breeds of dairy cow s Friesian,Aryshire, and jersey.Friesian produce highest amount of milk as compared to other breed whereas jersey produces milk with high butter fat content, so farmer can chose. Farmers preference.farmer can chose any breed depending on his or her choice. Here are characteristics of a dairy cow 1 .It should have straight top line 2.High stomach capacity to enable animal to feed heavily for highest milk production 3.well set apart hindquarters to allow room for their big udder 4 They should have prominent milk veins