My cats get Iams Senior hard cat food. It is down for them all the time. Even the 2 five year olds eat this, since one of them is a bit overweight. In the morning they each get 1/8th of a small can of Friskies soft cat food, as a treat. So one can lasts me 2 days for the 4 cats.
They get treats which are Friskies Dental hard cat food. Shhh, don't tell them their treats clean their teeth!