Snow tracks

It's been fun these past few mornings while I'm out walking Casey to see all the animal tracks in the snow. I can't believe all these different kinds of animals are roaming our neighborhood while we slumber. Identifying them all is not in my bag of tricks--and, believe me, there were many different kinds of tracks, more than are pictured here. These are just the most interesting pictures.This one's easy: birds. I'm assuming quail.

Slippery slide-y... some kind of big cat?
These are some gargantuan hooves...

Something with four feet. Beyond that, I'm not sure.