None of mine have eaten the commercial formulas with fruit and veggies added, they just don't like the taste. I'm not sure fruit and vegetables are that more "natural" to a cat's diet though. Fiber from seeds might be just as likely to be in a mouse's gut after all..and that is usually what we are thinking when adding fiber to the diet, replicating what they might normally eat when eating whole prey. Grasses are also more natural for them to chew on. Now my dog loves fruit and vegetables...