help me out please
Ok my German Shepherd male neutered is 4 years old. I had a spinal cord injury in 2012. I haven't been able to work with him as much as I did. He hasn't forgotten his training so much except in the house. He is so hyper that I can only keep him tethered for maybe an hour. It's like he forgets all of his training and he won't listen like he does outside. Turns into a brat!!! I finally have to put him back outside where he is alone. I hate it but with my balance issues and getting scratched up I have to. How can I get him to calm down in the house. I know exercise is part of the answer but again balance issue and back pain but....