Posted 24 April 2012 - 09:06 PM
I can't vouch for this personally, but some friends from an o/s forum have just mentioned how much their cats LOVE tomato - in particular, sardines in tomato sauce. This also wouldn't be an every day food for cats, but if they like it, it would certainly break up the monotony of a dry only diet.
Some cats like scrambled eggs. Have you tried raw meat? A couple of my girls like diced lamb, one diced chicken thigh meat. The aptly named VIP Fussy Cat Mince is in convenient portions - the most popular types in my house are the Prime Steak Mince and Chicken and the same with Fish.
If your cats have mainly dry food, try to ensure they have plenty of water.