Hello all! I am in need of some help. Earlier this week we got 2 female guinea pigs. They both seem to be doing okay with eating and drinking. They don't eat a ton of the pellet food but love the hay/straw stuff. I noticed on the smaller one she has a crusty scab between her one eye and ear. When i touch it she flinches. It seems to be getting bigger. Any idea what it could be?