You have only had him for three days. Did the breeder have him all over the place getting used to new environments? This may be a complete shock to him. Give him a little time.
What was the temperament of his parents? That probably predicts more than a one-time puppy test.
NAPWDA Certified Cadaver Dog
Waiting at the Bridge (italics
=GSDs) (hemangiosarcoma=blue):Grim , Cyra, Toby
, Rainbow, Linus, Oscar
, Arlo & Waggles