Show re replace p la c e cows to hold production keeping dairy cows productive over a long period of time Is the goal of dairymen they realize that one of the important items in ill milk production Is the replacement cost of cows states ray thatcher Thatch cr county agent A number of studies have been made which indicate that under average conditions some home 20 to 30 percent of the in ili a herd must be replaced each year this implies that the average length of productive life of a cow Is from three to five years and in ili some utah areas the turnover in cows is even greater replacement of dairy cows is either by raising betters from the herd or purchasing cows on the open market the raising of he bel fers for ir replacement placement is in most instances the more desirable practice the period of usefulness is normally greater the chance of 0 di sease being present Is less and it is possible to know definitely more about their inherited productive ability many of the factors affecting the length of productive life are here such as a inheritance tor for production however the cow also must have strength in conformation strength in the respiratory tract an and d an efficient digestive system she also must have an udder of good quality with ample capacity it needs to be well bal alced and well attached so that it will continue to stand up tip under heavy production over a long period of time |