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I have an almost 10 week old Jack Russell and he growls really bad it is almost like a visious growl and he bites I know just puppy bites but if he were any older I would swear he is vicious. How can I get him to stop? Of course he growls when you try to take something away that is normal but when I go to take him off another pet or pick him up to go outside. is this a normal trait?