ok i just went to go feed my two mice, and one of them has something wrong with her ear. it looks like there is a huge amount of either fresh or dry blood ( i think its dry but i was so grossed out i didn't get to make sure) it sortof looks like the ear hole was made bigger. shes not acting like shes in pain at all. a couple days ago my other girl mouse was grooming her more than usual. could that have something to do with it? should i go get some kind of medicine or will it just heal on its own. please answer as soon as possible!!!