Aww...it's cute, Amethyst! You're drawing an awful lot of Ren...Is your love of Yoh fading?
You did an extremely good job with the folds in the blanket, very nicely done. The horse looks quite good, especially given your inexperience drawing them. The eyes could probably use a bit of work, they make me think 'cartoon' rather than 'anime/manga', but definitely work well given the focal point is Ren. He looks quite cute and snuggly, although he seems to be missing an ear. Does his hair cover it usually? I honestly can't remember right now.
Anyway, looks very nice, and I'm glad to see a few more of your drawings actually being colored. ^_^