If you really want your animals to have ahealthy diet then may I suggest the BARF diet.
It's meat and raw foods. My dogs get raw chicken, meat, bones, organs & pulverised vegetables, NO CORN NO RICE!!! My cat eats raw too, lot less veggies though.
You can buy it premade or make it yourself:
http://www.touchmoon.com/dotters/raw/index.shtml