I was also wondering because my little robo has a 544 square inch bin cage and he was running on his wheel untill the first time I spot cleaned his cage. When I was done cleaning his cage I moved around his things in different places and that's when he stopped using his wheel. I thought maybe because it's in a different place so I moved it back to where it was before and he still won't use it. I'll sometimes put treats on it so he will go over to it and stand on it, but he still never runs on it, I can tell because it's not dirty at all like it used to when he ran on it and I cleaned it out every day. Please give me some ideas, I'm kind of worried! Also he is about a month and a half old.
