I just got 4 baby rats and they have been here for less than 48 hours. One of the girls woke up this afternoon and one eye was crusted shut. She is not sneezing or anything yet. She is also one that I have watched the more dominant female play wrestle/pin several times (I think it is "play"). She did have what appeared to be an old scabbed small scratch near her other eye but it seems ok. They are all siblings from same litter. I think the move was stressful for all of them but they are adjusting now. Do I need to isolate her? Take her to vet? Wait to see how if it resolves?