Any of the following are known to be a 'higher' grade cat food. The best thing you can do is do some research of your own on the internet

An excellent place to start online is the website about.com which has many researched articles on cat food and everything related to cats:

Cat Nutrition Articles

How To Choose A Cat Food

Dry Food Articles

Canned Food Articles



Next visit your local pet food store (most of the items listed below are not available at Petsmart/Petco but independant retailers) Some of the more popular brands are listed below. But this is not a complete list of what's available at all.

Wellness
Wysong
Nutro
Solid Gold
Felidae
Natural Balance
Eagle Pack
Innova
Merrick
Natures Variety
Chicken Soup for the Cat Lover's Soul

You can look for foods that are labelled 'human grade' but there is no regulation on the use of this term in the industry. So buyer beware since marketing key words to the public on packaging is not necessarily the 'whole' truth.

Also, the most expensive food is worthless if you can't afford it or your cat won't eat it! It's up to some trial and error as you find the food that works for your budget and your cats approval.