Mortisha is my 11 year old RES. She's been doing fine her whole life but a few weeks ago I noticed this absess or cut or something on her chin. At first it was small just a line like a small cut. But soon in grew bigger until it became very pronounced as shown in the picture. There is also a small boil-ish looking thing just underneeth and to the left of the line/injury thing. It has appeared to stop growing now but it is not going away either. It does not seem to be painful to her at all. I think I might be some form of mouth rot but I have no idea because she's never been sick before (I guess I'm lucky to have gone 11 years without anything like this). Anybody have suggestions? Treatments? I do know she is overweight but I have begun remediing that by feading less often and lower protein foods. Please help my little baby! 
(the picture is really poor quality, my digital camera sucks! her water is much clearer than it looks! and her coloring is brighter too)
