Holly, six years and Autumn, ten months get mostly meat flavored canned food. I did pick up a bunch of cans of fish flavored (salmon and ocean whitefish) which they both love. They only get it about twice a week. The problem is that Autumn is now preferring the fish. She otherwise doesn't eat enough. I tried putting about a teaspoon full of fish flavored in with meat to attract her to it. I know too much tuna is bad for cats, which is why I got the other two but how often can I give them the others?