I got mine from a breeder in Mililani -- Von Billheim German Shepherds. His website is down, so they may have stopped or changed their name. I know he was discussing moving the kenel to the North Shore.
Cozmo comes from a good bloodline that's AKC registered, but still developed hip dysplasia. Kind of killed my idea of breeding him.
His 2 siblings were sold and shipped to a company in Amsterdam that trains them for working dogs, according to the breeder.
We are glad we got this one, even with the hips. Smart, protective, safe around people we know, has never bitten anyone, but has a bark that even scares me!
He only had 2 accidents in the house, and one was my daughter's fault for not watching him. After that, 100% house broken without any fuss.
I crate trained him, and it was the first time I've done that. Worked great! Helped house break him, and I have a cage he feels safe in for when I need to isolate him if we have someone coming in, like for an appliance delivery.
I will definitely crate train any other puppies I get.

I just wish vet bills weren't so high. I would have had 2 or 3 if I could have afforded the checkups, vaccinations and treatments when they needed it.