OMG
Something today made me think of The Heavenly Horse from the Outermost West by Mary Stanton. I was OBSESSED with that book, and it's sequel as a kid. I was digging around on deviantart today and there's actually FANART. Not a lot, but it's there. The 9 year old in me is overjoyed. I think I need to dig up my copies and re-read.