http://www.frogforum.net/pacman-frog...acman-mbd.html This is the post I am talking about, I don't think I ever mentioned rocks (He has never had any). Though I am quite certain it is at least a slight case of impaction. It looks a lot like this --> http://www.frogforum.net/pacman-frog...r-stomach.html *Edit* I saw what you were saying, No that is not possible- They were very large rocks ment for making the tank slightly more "natural".