I wonder if Boo may have some form of Pica, a craving for odd things due to an underlying deficiency, as a result of whatever she experienced before you took her in? Perhaps if you tried her on a vitamin and mineral supplement, and maybe added some minerals to her water for awhile it might help. I have added "Animinerals" or Vitamin Shoppe "Trace Mineral Liquid" to my ferrets' duck soup routinely for years, so it should not hurt the others ... just don't overdo it, as it can cause diarrhea if too much is added. Follow the guidelines on the bottle. Also, might be contra-indicated for any ferrets with kidney problems. Second idea, to help with the chewing part, have you tried different flavors of foamy fries and Ferret N-Bones? [Posted in FML 6235]