Asides from the concern of knowing if they are getting a complete diet, I'm sure it will take a lot of effort. Just doing the research will take a lot of time. You already say that things have been hectic and you've had to take your ferrets that were on a more natural/raw diet and put them on kibble.

While your intentions are admirable, be careful you don't over extend yourself. I've been guilty of this in the past. I have a friend who tries to keep her family on an all organic diet home cooked etc diet. Then she gets busy and her family ends up eating McDonald's because she doesn't allow anything that would be not as good as her ideal diet but better than McDonald's into her house.

OK, 2 paragraphs about what was supposed to be a quick work of caution. Anyway, if you want to go ahead with it, I think the links Connie provided are a good starting point. Also keep us updated, because I'm sure many people here would be interested in your findings.