I went to pick up my guinea pig today to check her over and I noticed this was on her ear! I don't know if I should be worried or not since she doesn't have anything else wrong with her, and she's running around and doing things normally like the energetic soul she is. Her name is Rosie and she's 6 months old, roughly 7 now. Please help? I don't want to take her to a vet if it's not that serious! I provided photos of what the scab thing is. Thank you!