"I bought this for my first guinea pig and he never touches it. Purhaps it's because before I adopted him he never had any toys to play with, only the occassional small chew stick. So all this "nibbler" did was take up space in his cage and gathered dust. So after about a month of it being useless I took the whole thing apart and now I just use the little parts as chew sticks, which now my hammy and guinea pig like to chew! The nut inside was old and rotten, it was all black and crispy so I'm glad I got to it before my animals did, heavens knows what would have happened if they ate it...so yeah, if you know your pet likes toys and chews a lot then get this but otherwise if your pets are like mine, its a total waste."