Most of the day he is in the cage, but wants to bite everything, we have only two toys and I walk him twice in the evening. Help:D

My dog Lenox is a great dog, usually. For about a month now I have noticed him raging a little bit (hormone wise). It was not a big deal at first I figured, okay whatever hes 9 months and is figuring out himself and this is all a process. Now its become an issue. I have brought him around a few...