After a lot of vertex pushing, I got this thing planar. I used a couple triangles at the jaw line, but other that that it is all quads. I am happy with it, and it is only slightly above 400 Tris. Now I’m going to let my hand rest because it is cramping.
update
I noticed the neck was a little off, looked like the horse’s neck was scrunched up, so I fixed it a bit but didn’t go too crazy so that the planar quads wouldn’t be a pain to fix.
update
Noticed that when the horse was mirrored, the head didn’t look right, so once the mirror was applied, I fixed the head to have a more horse-like snout.