I'm in total agreement with Catty1 Tuna is a good only as a treat. Our Crew gets the oil or water once in a while, but the have dry food out all day, it is a mix of several brands but always includes a hair ball food. The balls are minimal. In the morning they get 3 cans of food mixed with the dry 50/50 spred over 6 plates. They all seem to be helthy and happy, except Lenny he only wants the wet food. But with the dry mixed in he still has a pretty good diet.