I'm sure a small amount is fine - btw - it's BOGOF in Tesco at the moment so 2 for 80p
I saw this article - the end is missing as you have to subscribe.
At the end of the day, a "balanced diet" is the best thing
These are probably the lumps Rosella was talking about.
Why is tuna fish bad for cats?
2006-12-07 21:32:17
Cats can develop yellow fat disease from having too much tuna.Tuna fish, and many other fish species, contain relatively large amounts of unsaturated fats. Although health-minded people eat fish to decrease their consumption of saturated fats, the excessive unsaturated fat in a cat's diet may be harmful.Tuna and certain other fish possess very little vitamin E. Vitamin E is an important antioxidant. When a cat's diet consists mostly of tuna fish that is not commercially formulated as cat food, the cat becomes deficient in vitamin E. Dietary unsaturated fats from the fish are oxidized by a biochemical called peroxidase into a substance called ceroid. Since the affected cat has low vitamin E levels, this oxidation process is not restrained. Ceroid, an abnormal, pigmented, yellow-brown breakdown product of unsaturated fat oxidation, is formed and deposited in fat cells. The result is yellow fat disease (steatitis).Ceroid triggers an inflammatory response by the immune system as if it..