Can someone let me know if I have this right? A cow goes into heat every 21 day give or take. She has her calf in 9 month and she is ready to be breed again on the 12 month. Now during this time she is giving milk to her calf for how long? Does she stop giving milk to her calf as soon as she gets pregnant again? How many months is a good time to stop the calf from feeding of the mother?