I feed my cats mostly science diet dry, but my two share one 3 oz. can of wet food a day. I used to only feed them dry food until Corkscrew started getting a little chubby. My vet said that cats who only eat dry food tend to me a little heavier because kibble has a lot of carbohydrates. Since each only gets 1.5 oz of canned food a day they are still eating mostly dry food to help keep their teeth healthy, and the little bit of wet food they get serves as a filler and they aren't eating as much kibble as thy used to. Corkscrew has lost a little wieght since I started adding canned fod.