I have inherited a sixteen month old jack dog. He has a whithered back paw and sore itchy skin. He also chews everything, and is very nervous. How can I bring him out of himself? If I reprimand him for chewing something like slippers, he freezers into submission pose, sometimes urinating. I'm at a loss. We have had him for 9 weeks now, and as soon as I sit down he jumps on my knee. I don't want him on the furniture but it doesn't matter how many times I put him on the floor he jumps back up.Help!