I have had quite a few dogs in my life. My most recent was another German Shepherd. Previously, I have had Pembroke Welsh Corgis, Shetland sheepdogs, and Belgian Shepherds but none like Bodie. Most of my dogs started to calm down by the age of two. By that, I mean that they could relax around the house. With Bodie, when he is not in his pen you need to keep your eye on him constantly. He will cruise the countertops looking for things to grab, mainly paper items but also shoes and clothing. He takes a lot of energy.
I guess he keeps me young.