So in the past week or so Cassius has entered a new phase in rebellion. He no longer comes when we call him in the yard unless he wants to, he's regressed alot in his leash training, Monday he destroyed the bed in his crate after lunch, and today when I went home for lunch he'd pulled a down blanket that we use to cover his crate through one of the slots and destroyed it.... DESTROYED... feathers everywhere. Thankfully I found him, my wife already got the joy of cleaning thousands of pieces of foam and fabric from his bed Monday. He is 9 1/2 months old and we've had him for a month and a half. Is this just his teenage rebellion coupled with being more comfortable in our house or is this something I should be concerned with?