hemme26 said:
This is probably going to be the silliest question you all have ever heard, but bear with me here. Is it necessary to continuously breed your dairy cows to keep up the milk supply? Or would milking every day sustain them and be enough to keep up supply even if it's only a small supply?
Q. 1: No, not at all. You can only breed a cow so many times until she become pregnant. Once she's pregnant, there's no sense in breeding her on a continual basis. A cow is pregnant for an average of 285 days which equates to 9.5 months. After she calves, she must have at least two (three at the most) months to allow her uterus to involute or shrink back to its original pre-breeding size and to allow her natural estrous cycle to get back to normal--during those two months a cow's estrous cycle is irregular and abnormal, and sometimes she won't come back into heat a month or so after calving. Once she's back to her normal reproductive rhythms, then she can be bred again.
But the thing is, breeding a cow does not directly affect milk production. As a matter of fact it's so indirect that it's got almost nothing to do with milk production--exception is for her to have a calf, which, once born, encourages her to begin to lactate. But that's it.
Q. 2: Yes. Regular routine milking is what keeps the milk flowing. If you don't keep up with the routine milking, or don't milk her at all for even several days, she will begin to dry up. If you don't milk her at all, she'll dry up completely, except if she's got a suckling calf on her. You can keep milking her for as long as you like, but most dairies prefer to milk a cow for 10 months, then allow her to dry up and stay dry for 2 months until she calves and starts producing again.