my dog growls when i pet him and he's eating, i'm not gonna have this , but i want to do it the right way. He's only 6 mo. old. he's part rott. part german shepard. Do u think i could stop it by showing him i'm "alpha male" by grabbing him and telling him no when he goes to bite? I guess i'd like have my arm and hand with a bunch of towels or something. I'm guessing this wouldn't work tho because i'm sure he'd challenge me later? am i right or will this break it ?