Critter tracks

In spite of snow, ice, and other obstacles, Cliff and I have been taking our daily walk in the pasture. I've noticed some funny, rather cute little tracks in several places near the woods:



Just for comparison, I made a footprint of my own next to the tracks. (For what it's worth, I have a huge foot for a woman.)


Does anyone have a clue about what sort of animal made these tracks? I'm thinking squirrels, after doing a Google search. Look HERE.