I will readily accept that this is likely a domestic dog track. Great Dane! The tracks were larger than my 120# Akita made.
I may be 'off' on this, but the track in my photo seemed very 'round', that is, just as wide as it was long. I see coyote tracks as a bit longer, fore to aft. Is this a useful idea? Are domestic dog tracks more 'round' in over-all profile?
There weren't any tracks of any kind preserved in the mud that day. It was just too large for a coyote track. And there were plenty of coyotes in the area. I may get back there with my shotgun (the only weapon permitted there. We found some coyote poop that was glistening fresh. When we returned a couple hours later, it was visibly older.