RE your question on the Mazuri food and TF in comparison to the protein and other key areas. Mazuri does have 38% protein whereas TF has 36%. The difference is that the Mazuri has both corn gluten meal and soybean meal as major protein sources, both of which are very poorly digested by the ferret. The fat level is lower in Mazuri (20.5%) than TF (22%). Mazuri uses animal fat rather than the higher quality, higher digestable chicken and poultry fat that TF uses. Also, Mazuri has a high ash level (7.5%) which concerns me since ferrets are very sensitive to lower urinary tract diseases. I hope this answers your questions and thank you for your comments. Dr. Tom Willard TOT FERRET [Posted in FML issue 0915]