All of the genes in the KIT series connect to the same locus, meaning creatures can only carry two of these genes in a series at most. For example, they can be ToSb (ne Tobiano and one Sabino gene), Sbn (One Sabino gene), or SbSb (Two Sabino genes). But they can't be ToToSb because that's too many KIT genes!
They are codominant, meaning that if a creature carries two different KIT genes, the effects of both will show. Having two copies of the same gene generally causes white from it to cover more of the body.
White appears on the face and stomach, sometimes extending to the tail and neck
White does not reach the shoulders, legs, eyes, or ears. It may also leave the nose and mouth unaffected.
The head and body spots will always have a gap between them near the shoudlers
White on the hips may taper off in a gradient
Does not affect skin.
Mane and tail are white where skin beneath is affected by Pd