9 month old still biting and chewing everything in sight please help?
So I currently have a 9 month old, black GSD puppy named Kody. He is intact because he comes from a nice working line, is AKC, and I plan on training him in Schutzhund and breeding him if he passes all his health tests when he's older.
Whenever I go outside to give him food and water, or to play with him, he always jumps up on me, scratches me, humps me, and bites my arms and back. Whenever he jumps up and humps me I cross my arms, turn my back to him, and spread my legs apart to make him lost his grip and force him to stop. I then ignore him until he calms down. This usually works, but he often jumps back up pretty quickly.
Another problem is that sometimes he'll get annoyed when I don't let him hump me so he'll bite my back. For this I usually stand there, turned away, arms crossed, trying to bear the pain without letting him notice. He also likes to jump up on me after I finish rubbing his belly.
The main problem, however, is that he really isn't allowed in the house unless he's in the crate because he's so crazy and grabs everything in sight. We usually keep him in the backyard a lot (unless it's cold or rainy or snowy or too hot out) because of this so he can run a lot. I throw the ball for him and walk him as often as i can, but I really don't have that much time with the hours of homework I have almost every night. Sometimes my dad and I will put his leash on and move the coffee table and other sofas out of his reach while we watch tv, but even that's hard to do because kody bites us and grabs anything he can find, even though we provide him with a bone and kong. Any ideas????
I already institute the NILIF as much as possible; he has to at least do two simple tricks to get his food, sometimes I hold entire training sessions using his whole meal. He is crate trained and sleeps in his crate in a separate room from me. He does okay with loose leash walking.
Please help me with this; I really want him to be able to walk around the house like a normal dog. Oh, also, he is about 55 to 60 pounds (last time i weighed him he was 45, so I'm estimating). Thank you so much for reading, any advice is much appreciated!!!