Theres CLEARLY some cat owners/ animal haters in this thread. Why is it the dogs fault that the kid fell on it and it nipped at them? derp logic. I have 2 twin boy infants and when they get older and fuck with my dog and he nips back i'm sure not gonna be all "herp derp stupid dog, time to throw you out or put you down." They will learn. Its not the dogs fault. If you can't realize that then you shouldn't own animals in the first place. But also like others said. You should claim alpha in the beginning in case he nips/acts aggressive out of nowhere. I have no problem snatching up my dog and putting him to the ground to show him not to do certain things or act a certain way. For the most part he's good.