British Milk Production. No. 2. For a high milk yeld, look for these points in a dairy cow. Kerry cows, as illustrated above, are a hardy breed and, although light in weight, give a good milk yield with a high fat content. Good milking qualities can be inherited, so care is taken by British farmers to select a suitable bull for breeding. Points to look for in a good dairy cow are that her body should be wide between the hind legs; she should be long from the hip bones to the pin bones ...