Protective of house getting scary
My german shepherd Hunter has become very protective of the house anytime someone he doesn't know rings the doorbell and comes in he goes nuts barks and growls like crazy. I have a prong collar and I yank it and make him sit and he still won't stop. Or if he does stop after a while and the stranger comes up to him he barks and almost tries to bit. One time someone came over and he was barking like crazy and jumped on her. I really don't know what to do I need help!! He is 6 months old. I got him at four weeks and he has always been a little scared of people but he is getting better with that. But getting more protective of the house.
I would love your help!
Thank you so much
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