nG or GG

Grey causes the hairs of a horse to slowly whitens the body over time, it usually starts around the eyes on foals creating a goggle look. A bloodmark/fleabitten look will be seen early on. 

nMld or MldG or MldMld

Mold usually starts like grey around the eyes. Later popping up near the groin, chest and armpit, Following the natural hairs. It will rarely stray from these spots as it goes, slowly taking over the body. Only hitting the top line and ears late in the molding stages.

When two copies of Mold (MldMld) are present the mold will go over any marking making the horse, while with one copy (nMld, MldG) it will go under any marking. Mold will never affect the skin or hooves.