Bought this for my 6 month old puppy because he has cerebellar hyperplasia aka as wobbly dog syndrome. He needs to play on soft cushioning as he slips and slides on a normal floor. The ball pit was recommended as a safe place for him to play. As of now he currently does not like it at all. I removed the balls and he still doesn’t like it so I think it is the way the foam floor fills on his feet, which is interesting because he has no problem trying to chew foam any chance he gets! Going to hang on to it for awhile to see if he comes around.