I feed both of mine science diet, they LOVE it and it works really well for them. I was feeding them MaxCat before, but got a coupon for a free bag of science diet, so I figured what the heck and tried it. I mixed it in with the MaxCat, but when the SD was gone I went back to straight MaxCat, but Katie followed me around the house meowing very loudly for a week before I figured out what was wrong. She wanted more SD! So I switched. They are both very healthy.