Birdcatcher spots?

[SpecialEffects]

A friend bred her mare - Hillaryswinner - who has a half star as her only facial marking. She started developing another white marking just above her nostrils. It keeps getting bigger and there is also a small slash in one nostril. I saw her yesterday and a lot of the white mark has pink skin under it. She at 352 days now and it's still growing. lol

I asked ACC and she felt it was a group of Birdcatcher spots. Any opinions. This is so strange!

Hillary in January


Hillary on Feb 26


Hillary on Mar 16


Hillary on May 1


So what do you guys think? Thanks so much!

[summerhorse]

It could be but with new pink skin under it I might be thinking of vitiligo or a fungus that causes a similar effect.

[SpecialEffects]

Thanks. The vet was out and he just shrugged and didn't think much of it. lol (he was out to see why she was not spitting out the kid )
She has now foaled and we shall see if the mark disappears once the nursing slows down or stops.

Thanks for your reply.