There was also mention of some folks trying to capture a Monad cat, which I always took to mean a CFD infected feline. There aren't any hard rules to differentiate critters vs. metahumans with CFD.
As far as behavior goes, I think the AI is much more likely to win, thus apply those behaviors various CFD victims have, in an animal body. It's basically an AI in a biodrone at that point. As far as the stats go, take the critter and start sticking CFD stuff in it. It'll be funny when some zookeeper tries to tranq a lion and sees the load that would have taken an elephant down not even phase it.