my question is: when i visited the breeders home to pick up my puppy, the parents were non-friendly and the male just growled at me. i am a dog lover and never encountered non friendly dogs until i met the dad. now my pup is 8 months old and very aggressive and hard headed. is this related to the parents being not friendly and un petable? should i have just walked away and waited till i found some friendly parents ? i am curious as my last dobie was very easy going, and not acting like a guard dog as this one does.