our house rabbit has been living in a cage for the last 2 months. we have him out under our supervision as he cant be trusted on his own, and its too hard to completely bunny proof the home. so, we decided to buy him a dog play pen. we set this up with his cage in there and now he doesnt use the cage for the toilet, but random areas of the carpet within his pen. any way to teach him to keep using his cage?