looks pretty good.
The texture also looks quite fine for a 'quick and rough' solution.
Stretching the neck out seems a bit odd for the stance of the horse. Are you doing that because it might animate better? Just curious.
The cheekbone is a bit square.
Progressing very nicely
Check out the subsurfacescattering on my tongue...
<a href="https://www.reitzmachine.com">www.reitzmachine.com</a>