Uncle Jim's Original Duk Soup Mix for Ferrets - 4.5 oz Uncle Jim's "Original" Duk Soup Mix has been used successfully over the years at the Marshall ferret breading facility. Uncle Jim's provides additional nutrition that may be required by ferrets who are finicky eaters, recovering from surgery, have experienced ECE symptoms, or ferrets that are ill and in need of a soft diet. It stimulates ferret's appetites, boosts their immune systems, and regulates digestion. Uncle Jim's "Original" Duk Soup Mix is a great daily supplement with guaranteed positive results. It is not intended to replace ferrets' daily nutritional regime.