For those who have experience with German shepherd's, our dog, that's from working lines, turned out to be a right pain in the hole, he never settled in to a pattern of behaviour, he did some things you'd not expect him to do, and basically he turned me off shepherd's for life... He was at times very good at guarding, and other time switched completely off, and then other times I'd have a mate in the kennel and out of the blue he'd become defensive and focus on my mate even though I was there, one shout and he'd stop but I had to keep an eye on the prick the whole time... He focused on people