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GSD’s were originally bred for herding, but they also excel at protection sports like IPO. I’ve seen them compete in agility and barn hunt as well. Also something you can do on your walks is to put a weighted back pack on him. That way he has a job to do by carrying your supplies. If you have inclines and mountains where you live, go hiking with him. Also practicing basic obedience daily mental stimulates them and helps them build confidence. Even simple things like sitting and waiting for food, not walking out the door before you do. Small things like that. They make a big difference. Also consistency is important for dogs. They like routine and can often get anxious when something is changed, so try to keep feeding times the same and bathroom break times the same as much as possible.
