My Pomeranian/toy poodle puppy is almost 6 months old, we got him at about 3 months, he has always had issues with teething and nipping but it was never malicious he was just hard to train with this behavior. Recently, he started biting HARD and angrily when we do something he doesn’t like. He bares his teeth and bites our hands if we try to take something from him he shouldn’t be chewing on, and if he knows he’s going to be put in the crate. (I have to put him in the crate every day he has never gone in willingly. He’s rarely in there more than 4 hours as I often work from home but he has NEVER bitten me for this until recently, only whined). This is not his typical biting behavior!! If he is play biting and we tell him to stop he stops and starts licking which is progress from before! This is new and very obviously aggressive he doesn’t let go and draws blood! What should I do?