Absolutely, he had one of the highest prey drives I, and others, have seen in a dog. He was a lab, built like a brick shithouse, fast like a greyhound, and as stubborn as a mule. I started training on him too late and he did not have an out. When I passed him on, the trainer that was working him tried to teach him who was boss. The dog was picked up off the ground with a choke chain and he was still trying to bite. The guy showed me the scars on his legs and arms. Yes the dog propably would have come around with a great deal of training but I did not have the time, and he was not worth the money for someone else to do it.