Here's a pic of a black horse I've been working on lately. It took me quite awhile to get the texture looking right but I'm pleased with the result. I'm hoping I can get a brown and also white horse off this texture by swapping colors out. This model contains 632 polygons or 1174 tris.
Basic model:
Trotting:
A few other blanket textures:
Basic model:
Trotting:
A few other blanket textures: