My guinea pig suddenly has a bald spot under her eye. I have been on vacation for two weeks and left her with a pet sitter, so I don't know exactly when the balding started but I am pretty sure it began recently. under the bald spot there is also dried blood. The eye itself seems normal and fine. Earlier I put some vaseline on the wound to protect it, and I noticed her cage mate was very gently licking that spot. I do not know if she was just licking off the vaseline though, or if she is the reason my other pig has the bald spot. There are no other bald spots, she is eating well and such, and generally the two guinea pigs get along well.