I thought this problem was because my dog was just young and she would grow out of it. But now she is more than 1 and 1/2 years old and still chews on things. The worst thing is that I can't keep a collar on my other dog. Whenever they are in the kennel my pup chews the collar off of my other dog. Nylon collar, leather collar, it doesn't matter. What can I do to stop the chewing? She doesn't do it when I'm around and when I have them out hunting she is all business. Any ideas would be appreciated.