Hi, I have a 10 week old Jug puppy. I’ve had him 5 days! He is adorable all day long and then the witching hour comes, he turns into a horrible biting ball of aggression. He bites my sons legs and scares him and if I’m honest he scares me too. We try to distract him with chew toys and if he gets really bad I put him in his crate. Does anyone have any helpful advice please?