Least-cost formulas use the cheapest ingredients that will provide the guaranteed analysis shown on the label. Fixed formulas like Totally Ferret or Iams, have the same guaranteed analysis and ingredients in every bag. Totally Ferret, at the present time, is the only food designed and tested exclusively for ferrets. Other foods marketed for ferrets may be cat or mink foods, perhaps modified slightly, and sold to the consumer at a higher price. These foods may or may not be nutritionally complete for ferrets.
Many foods contain animal by-products.
These preservatives are considered by some experts to be harmful to the health and may increase the likelihood of cancer. These enzymes allow proper digestion and absorption of nutrients as well as protecting against harmful bacteria, viruses, and parasites. I prefer to supplement the diet with Ferretzyme Plus which contains digestive enzymes and probiotics. First, speak with your veterinarian. Health considerations and age should always be the first priority.