During the year of 2009 I was only teaching part time and wasn't sure I wanted to keep teaching. So I enrolled in an Animal Studies course and started working part time at Paddington Cat Hospital as a vet nurse. While I really loved the job and getting to spend so much time with cats and learning all about them, vet nurses are severely underpaid in Australia so the temptation of making the career change full time was not an option. I learnt so much though and now feel qualified to dish out advice about cats.
For their wet food cats need a wide variety because they get bored quickly. Again the premium brands are complete and balanced, but Bos and Ollie loathe Science Diet wet food and aren't too crazy about Royal Canin wet food either, however they do eat it every now and then. They like IAMS wet food, but don't love it.
Some supermarket brands are complete and balanced, some aren't.
Fancy Feast White Label - complete and balanced
These are the foods my kitties eat, they only eat the ones I recommended as a treat on the rare occasion, purely because I feel like I don't have a choice. They need variety or they pretty much refuse to eat. And happiness is also an important factor in your cat's diet! One other thing I do every now and then is give them a cat vitamine, just to make sure their immune system stays extra strong.