We brought my pup home about a month ago. He was 2 1/2 to 3 months old when we got him, and now he's going on 4 months. When we first got him, he didn't bark hardly ever, just whined when he had to go potty. He loved being brushed and was the sweetest damn thing. Now he's just being crazy. He barks and barks and barks. I try to ignore him to let him know that barking doesn't get him what he wants, but it doesn't stop him. He also bites, he bites hands, he bites whatever he can get his mouth on. He hates being brushed and tries to bite the brush and bite my hand and he really hurts!
I don't know what to do. I'm at a loss.
Help!