What do you guys use for toys in your piggy cages? Mine LOVES balls but she is a chewer, the wicker balls that they have at the pet store go over well but are chewed up so quickly, I just can't keep buying them. I tried one of the small (4" maybe?) playground style plastic balls that my daughter had and she LOVED it but chewed it up after a little while and I doubt that is good for her belly. I was thinking about looking into dog toys? Any recommendations or advice would be great!