My guinea pig (Snickers) is about 5 years old. She has a very large and swollen nipple. I have tried draining it by squeezing to get a brown/bloody mixture out. She doesn't seem to mind it too much, but it really looks awful. She still eats, drinks, and plays just fine. I know there must be something wrong, but everywhere I called needs money up front to even see her. Please someone help me! Due to some work issues I don't have the money to take her to the vet.