wow, he is little to be staying outside by himself. I've always had inside dogs, even all my big ones, so it seems odd to me to have pups outside where so much can happen to them.
Even an outside dog will want human companionship and especially GSDs. They want to work as a team so yes, the more you do little obedience skills now and the more you play with your dog, the better. It is work and you won't always feel like it but the payoff is amazing!
Patton CGC BH
Chief fetch fanatic
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