Another of those trick questions! Much is dependent upon the breed, forage, foraging conditions, individual genetics, etc. Some cows are old at 4 some are young at 12, rpobably around 6-8 would be the average, but some go on reproducing into there teens and possibly into their 20's. Others give out after only a couple of calves. If you don't retain any heifers sired by your bull you could keep him till the year before he doesn't get the job done anymore. Figuring out what year that may be can be pretty tricky. A Breeding Soundness Exam (the good BSE) should tell you if he can get the job done. But that doesn't really take into consideration of libido. If you retain his heifers, get rid of him before he can breed his daughters. That will stir up some serious controversy.
dun
> Can someone please tell me on
> average how long a cow will live
> and how long she will reproduce?
> Also how long should I keep my
> bull before replacing him?
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