Ah dumb humans...
Anyways, I find it really respectable that although you decide to live a certain lifestyle you don't feel the need to force it on everything with an iron fist. Seriously, I think it's great that you can separate your life choices/ideologies (meaning i don't know if you're vegetarian because you feel healthier or because it's because of beliefs you hold) from what your animals need and are willing to feed them what you feel they'd be healthiest on and what they'd thrive best on.
btw, can you tell about your ferrets diet? Never had ferrets, don't know much about them, but I'm quite curious.