About 4 days ago when I was handling Delilah (1 year old Dumbo) I found a small bump, like 1/4 the size of a pea about 1cm above her urethra. I didn't think much of it, but now, checking on it again, its about the size of a pea, no denying it. Somethings there.. This is the first ever "lump" that I've ever had on any of my rats and I really need to know what to do. I know mammary tumors are fairly common in females so could this be that? Or maybe an abscess because it go so large fairly quickly? I will try and post a photo when I can but until then, any help is amazing. Delilah is my baby girl and I would be devastated if this was a tumor..