There are two creatures in my home not at all bothered by the wintery weather - my very much indoor cats. They're never interested in slipping out the front door because they know they've got a good thing going inside. All afternoon they've been snoozing on the couch, while I've been freezing outside like a dum-dum to walk the dog or shovel. Here I imagine Ariel was getting just a bit too warm curled up, so she stuck out one foot to cool off. I know I use that tactic when it's a bit too cozy under my duvet.
Oh, what a life.