Second of the known Russian breeds - small Cossack.
I think of them as being mottled brown with occasionally added grey and optional white markings - much alike horses actual Cossacks used to ride. I used a bit of artistic freedom here and made them smaller than described in books - of size suitable for one person, unlike Winchesters (which are able to easily carry two people) that they were compared to. Again for the same reason - Cossacks weren't by any means a heavy ride and their horses were rather small/slim.
Also I guess I always wanted to draw a dragon scratching itself like a dog... well, here it is xD