Swheat Scoop litter clumps because of the wheat proteins in its name. There are no chemicals, or other ingredients for that matter. (If you look on the side of the bag, the 'ingredients list' consists of one word, wheat.) If your ferret tastes Swheat Scoop to determine its food value, that's fine. As long as your ferret isn't eating any great quantity of Swheat Scoop, it is perfectly safe. If your ferret IS eating quantities of any litter, it isn't going to be safe. That includes cellulose-based litters, such as those made from newspaper. If your ferret does tend to eat his litter, he most likely has a deficiency and needs to see his vet immediately. The situation is no different from a dog that eats feces and grass. A ferret with a balanced diet won't feel the need to eat his litter. Gale "Don't smile at me like that! That's not even a real smile; It's just a bunch of teeth playing with my mind!" Lt. Templeton Peck [Posted in FML issue 4521]