The horne'd bunny of Woolsery
http://www.istockphoto.com/file_thumbview_approve/5542048/2/istockphoto_5542048-animal-tracks-rabbit-footprints-in-the-snow.jpg which looks very much like your images, doesn’t it?
I currently have 21 pet rabbits looking for homes here at the sanctuary... we also have some snow.... Would it be really really terribly cruel of me to test it out? You know: Bunny walking in snow; bunny running in snow; bunny freezing it’s ...err... tail off in snow.... all in the name of science, you understand...
So I wrote back:
Have you thought of Springheeled Jack?
Well, as always seems to be the case, you start looking at one mystery and you end up looking at another. I have been on the track of England's elusive marten population for twenty years now, and there are, indeed, records of this rare and beautiful carnivore in Co. Durham. The only problem being that according to accepted scientific methodology the species was hunted to extinction in all of England by the 1870s....