Bree does the exact same thing with her toys, she can be really aggressive with them. Recently, I saw her chewing the fur off of her tennis ball. When I tell her that's a no no or try to take them away from her, she either hides her toys from me or make me chase her around the house to get them. I gave her a rawhide bone a couple of times and it kept her from destroying her toys for awhile.
__________________  Bree's Mommy 
SHE IS MY |