I am concerned. I have had mike for over a week now, and he has only run on his wheel twice. It was the first two days I got him. Now he wont run on it. I have put wet kitten food on it in a spot that I know his little feet wouldve touched. I also put a small peice of banana on the top, which was left untouched. He likes to sleep UNDER it, but wont go on it. He has the big comfort wheel, which is big enough for him with room to spare, so I know it isnt too small or anything. What do I do if he isnt running to get his exercise? He gets played with everyday, but is that enough? Thanks! :?