My female rat (Cricket) is old (almost 3?) but still acts like herself, eats, drinks and bathrooms pretty normally. However, she has a very large benign mammory tumor. It is large now and certainly taking all her nutrients. Still, she acts happy and alert. It is hard on me bacause I thought maybe by this point she'd change and I'd know it's time to say good bye but she's literally herself still. I am totally in love with her. That is besides the point. Today I noticed her tumor has a very dark colored pretty sizable "scab" on it. Certainly the area that drags the most on the floor. I had been puttin olive oil every so often on that area of her tumor to help with irritation. Now today, the big scary scab. I thought ok, I'll watch this every day to make sure it doesn't get infected -- right? Of course I can't sleep so I started doing research. And necrotic tissue is a thing. That is awful. And leads to a painful death or sepsis because toxins are released into the blood. She would need to be put down asap. Can anyone please help me identify if she has a normal scab or dead necrotic tissue? Or could it be both? I'm leaning toward normal scab because it's the obvious area that drags but could that also be necrotic ? Like necrotic tissue doesn't just happen on its own right? Thank you in advance. No nasty comments on how this should be removed and about how terrible I am about letting it get so large. Her father and I are constantly weighing the decisions and have been faced with hard ones and very attentive from the start. Yes she has been to the vet. Just not with the dark mark as it's new. Thanks again.