So I came up with a few eyes and animal-based marking ideas.

EYES

Partial heterochromia
basicaly the same as heterochromia but only part of the one eye is covered in different color. I was also thinking of including brown-green variation of heterochromia.
RL example:

Lioden example:


Diabolic/Inferono & Wolf/Wild
Inspired by some fancy contact lenses

Lioden examples:

MARKINGS

Socking
(white marking) A hard marking leg socking that appear on many domestic animals. Can come in many shape variations:


Badgerface
(black marking) Dark face marking inspired by that of a badger. Comes in domestic bovines and horses.


Minimal brindle
(white marking) Long reverse brindle stripes concentrating on neck and hips. Inspired by horse markings.



Bloodmark
(black marking)Inspired by "bloodmark" - patches of base coat on grey horse. broken, spotted patches placed randomly anywhere on the body, shapes and sizes may vary.