Greetings from Boston , MA
Hi y'all, I am new owner of a GSD, who is 4 months old, got him at 8 week old. He is a Service Dog In Training, a gift from a breeder in Texas. Is great with commands, verbal & hand, however, he is jumping up & biting? Any advice? I am heart broken he is doing this. I waited 3 years for him. Thank you.