Omega 3 Fatty Acids from fish oil (not cod liver oil) are great for ferrets, especially for their kidneys, BUT there have been cases of Nutritional Steatis (Yellow Fat Disease) in ferrets feed too much of certain marine fish or too much squid. Kits, especially, are prone to dying quickly once signs become present. See either the FML Archives or the FHL Archives for more info and see _Biology and Diseases of the Ferret, 2nd ed_ which has the beast nutritional section I've seen in any vet text new or old, and which can at times be gotten new or second hand at Amazon. Recently a ferret food maker who I have known since before he began designing his first ferret food told me that he wondered if those bouts were due to spoilage, and I have read other explanations which call for the providing of extra Vitamin E and explaining that Yellow Fat Disease occurs due to too much polyunsaturated fat in the diet and too little Vitamin E in the diet. The animals with it who were not beyond treatment were given E. They actually fit together. Quoting from the vet text mentioned above on page 166 and 167: "Polyunsaturated fats are highly susceptible to oxidation within the food source as well as within the host's tissue, and vitamin E is a critical nutritional component in protecting tissue lipids from oxidative injury." Sukie (not a vet) Recommended ferret health links: http://pets.groups.yahoo.com/group/ferrethealth/ http://ferrethealth.org/archive/ http://www.afip.org/ferrets/index.html http://www.miamiferret.org/fhc/ http://www.ferretcongress.org/ http://www.trifl.org/index.shtml http://homepage.mac.com/sukie/sukiesferretlinks.html [Posted in FML 5889]