Back about 1996 my then Fiancée HAD to have an Old English Sheep Dog.
I wanted to get a dog from the Charlotte Humane So. But she HAD to have an Old English Sheep Dog with papers. So I told her to find a reputable breeder and we go look at the puppies.
On the way there, I asked he if she knew how to choose a puppy. She said that she had dogs before, she wasn't an idiot. I told her not puppies that your Dad or Mother brought home, but choosing a puppy. She said of course she did.
We no sooner go there and I asked to see the parents. The breeder said that wasn't possible, that the male was too aggressive. (RED FLAG!)
I told my Fiancée what the guy said, and she said, that didn't mean the puppies would be that way. So instead of paying with the puppies then walking away and coming back and let the puppy choose you. she looked them over and promptly said, "We'll take that one. It has the best markings."
I asked her what did markings have to do with a good puppy. She said that she wanted to breed him and that the puppy had to be a male and have good markings. (So much for "How to Choose a puppy!")
2 years later I had to take him to the vet and put him down. He was so aggressive that he would attack her! (He was OK with me, but I was the one who make him behave, so he looked at me as the Alpha Dog.)
It wasn't the dog's fault, but my Fiancées. No sooner than I got the ashes back, than she started up again, wanting a Old English Sheep Dog. I told her that it would be a cold day in H*** before we got any dog.
Several years later, I went to the Humane so. to adopt dogs and ended up adopting a cat. No longer have the Fiancee, but 10 years later, I still have the cat!
I'm kind of worried about this with the GSD too. Nobody else is really an authority with him but me. I'm afraid he's gonna walk all over everyone else when he matures.