Aha, this is a sympton called Dino Rabbititis. I have experienced it myself before. You start out with a unique rabbit variant. Next thought is "well I should add tour guide for leviair to recycle rabbit." after that you start thinking, "well, it would be nice to at least have the option to bring out a laggia or dolkka so i'll just add 3 sabersaurus ... just for the option."
Before you know what's happened, you're playing a Dino Rabbit deck.