age of calf first heat
Post by theburrowfarm on Dec 30, 2012 18:47:18 GMT -5. She can go in to heat as early as 4 months .You should wait till she is 14 months to breed her . Post by Dahdo on Dec 30, 2012 21:54:15 GMT -5. We just had our 8.5 month old heifer have her first heat. We had three similar aged bull calves in with her so I was a little worried. She had a second heat 17 days later which was a bit early, but it was a relief. You are right to keep them separated until she is at least 14 months.