Oooookay. SO. I've had my mare for 4 years. She started with a patch of white on the left side of her withers (no it's not from the saddle, it's in front of it.
Then she started getting a lot of white on her neck (both sides) then on her butt, mainly behind the hips. Now she's getting more and more white all over her body.
There's no white on the black on her legs, or her face (aside from her moon shaped star)
There's some in her mane, but more in her tail.
When she starts growing her winter coat, the white isn't as noticeable, but when she sheds out, there's WAY more white than before.
What is the from? She's about 11/12 years old