After 50 years in the cattle business, we are bewildered. we had a small group of cattle (9) bred by an AI bull that we raised - calve this spring. 5 out of the 9 had nursing problems. 1of them NEVER would suck and is 2 weeks old now. we gave him to a man who was sure he could raise him, but he is just tubing him twice a day. (His tongue won't curl right - hard to explain - and we worked with him 2 hours morning and night for 10 days..) Now we have a big strong heifer calf born last night around midnight (about 18 hours old now) - she won't suck - just licks the teats - won't suck when they are placed in her mouth - her mother has small open teats (with plenty of milk) that we checked. the little calf noses around and then lays down. The other 4 calves finally nursed after 3 or 4 days of working with them. Question: could this be genetic? My husband says he has never heard of such a thing. But 5 out of 9 is unbelievable. HELP!!!