Three toed footprint?

Me and my friend were out in are yard this morning and it had been snowing quite heavily. At the boot of our car we beheld a three toed footprint about one third of a foot long, with three toes about two centimeters apart from each other with one two centimeters in front of the other two, they were all arranged in a kind of arc. about a third of a foot back there was another mark. All these marks were circular in shape. The footprints continued at about half a meter intervals and then stopped when the snow ran out. Does anyone know what this could be apart from a dinosaur?