That's a shame Naku doesn't like the rabbit. I've been feeding primal but haven't tried the rabbit yet. I guess I'm pretty lucky because I haven't had any serious issues or any issues, which means I have no helpful information for you. I have noticed much fewer poos in the box since feeding the raw, though. Those in the know say it's to be expected.
Good luck with your kitties.
Good luck with your kitties.