I am pretty sure the in the 1st photo it is a boot print, probably worn by a human, next to rabbit tracks. I have been seeing rabbits out for a week or 2 now. And since Tuesday, a lot of boot wearing humans.
I'll go with rabbit. A quick way to tell the difference between a rabbit and squirrel track if the front paw prints. A rabbit has one hole and squirrel has two. Next time you watch either animal look and the build of their front section. The rabbits usually rest with their front feet touching. Squirrels on the other hand have broad shoulders and usually move with thier front feet apart.
I saw the little critter at dusk last night. Dog was intently focused on something through the front door. Was a small brown bunny. Very cute hopping around.