My 2 month old black lab is having trouble getting used to the leash (And collar as well). I've tried treat based rewards, but the problem is as soon as she sees it, she'll bite down on it and won't let go. And as soon as it's out of her mouth, she goes into the puppy crazies. I tell her no, but she'll start biting me and my clothes and begin to run around, trying to get the leash back. She thinks it's a game, but distraction with another toy means nothing to her. It's only with the leash and collar I have this issue. Any suggestions?