Which is the best cat food from a supermarket? What's the worst? Which is better felix or whiskas? This isn't for me, one of my "friends" just got a kitten (from her sister who likes to breed moggies) and I was trying to explain that supermarket food is complete rubbish and she'd be better ordering it from zoo plus etc. She believes that supermarket cat food is the best, and plans to feed whiska's. Was just wondering what is the best food you can get from supermarkets so I can suggest it to her.