Just curious. What is the health regen rate on animals? Are they different by species and/or maturity?

I have a very strong coyote around my place with 274 hps and 1 health/per second regen rate. I've tested this a few times. I haven't had much trouble with most of the other animals so I haven't paid attention to their health regen until now. I don't know, maybe the regen rates have always been that fast. I can't kill this coyote atm so I just avoid him.