Hi, I have 3 border collies a 13 year old a 1 year old and a 6 month old pup. I have never had any problems with nipping in this breed they are friendly and social. They do need a lot of exersise and obedience training is also a good idea, both my younger dogs are in training at the moment and realy enjoy it. I will hopefully be breeding from my new dogs when old enough but not for a good while yet. I hope that you find the right pup for you. Do not be afraid to say no to a pup when you visit one if it does not feel right. Buying a pup because you feel obliged to or because you are desperate for one is not a good idea, take your time and get the perfect match.