Karen, it would contain the proper nutrients, here is a link:
http://www.radfood.com/

If Robin likes it, that is good news. I can well imagine it is quite costly. Would you consider preparing foods for her yourself? It will cost less, and you can find plenty of info using Google and put in: raw cat diet

Here is a good link as she discusses the equipment you will need:
http://www.catinfo.org/?link=makingc...%20vs%20Cooked

It will take some time up front, finding sources for what you need, but long term it would be a great way to go. If you can afford the RAD diet, that would be good too.