Definately canine and since there aren't supposed to be any coyotes I'd say somebody's dog ate a bunny, or a cat. Given the time of year and the assumption ( I've never been up there so I could be wrong on this) that rabbits are mostly white in winter time ( I know when I lived where it snowed (KY) most of the rabbits were white in the winter) I would guess somebody is missing a cat.
David
Some people have been thinking owl but it seems too large in diameter for any owl scat I've ever seen. Also, after a second look, there seem to be two slight tracks ( about 11 oclock and 1 oclock) in the picture. That could just be my imagination though.