Oh, how horsey! Appaloosa is somewhat of a mix between blanket and tailwind, with some floaters and holes in it.
Specifications and Rules
Holes are a must here, so don't forget to add them. You still have a choice in how many holes you put in it, just make sure it has a fair amount. Floaters are optional, and islanding is a no-go.
Ranges
The easiest way to make this marking would be to make the basic outline, color it in, and create holes on the edge. In dominant form, a patch on the face may also be used, but make sure to apply the same rules to it as the rest. Meaning: Holes are still a must, and no marking "islands".