This is my first litterof my own. I have seen other people have litter of puppies but I have never seen this kind of action out of them. Is it normal for puppies to JERK on mama's nipples during feeding? I breast fed all my kids and honestly sees that as an OMG OUCH kind of reaction but it doesn't bother my mama dog. Honestly, is it normal for puppies to do that? Just JERKING on mama constently? She has bruises and deep red marks all over her nipples so this really strikes me as not normal but I could be wrong.