I've got a one-year old male rat, Finn, that is struggling with something -- an abscess, a tumor, I don't know. What I'm hoping is that someone has had experience with something similar and could offer advice about the best path forward. About three weeks ago, Finn developed an huge bump on his head, between the eye and ear. I took him to the vet, which prescribed a 5-day round of antibiotics. Of note, I live in rural Wyoming. Our vets are likely some of the best equestrian and bovine vets around the nation, but when it comes to exotic pets, experience is limited at best. To my knowledge, I'm one of maybe five pet rat owners in the county. The vet didn't have many answers, but I was satisfied she knew enough to treat the symptoms. The bump improved, but after the antibiotics ran out, Finn started getting worse and losing weight. A couple days later, we were back at the vet. This time she tried to lance the bump like an abscess, but said when she pushed on the outside, the fluid drained through his mouth without the need for incision. This worried me a little, since minimal google research advised against attempting to lance a possible tooth abscess from the exterior. Still, this the only vet I have access to in a 100 mile radius. I'm not a vet (or at least, not that kind), so I trust she did what was best. Another round of antibiotics helped Finn regain some of his energy and the bump became a mass of scab tissue, which I kind of expected. The scab smelled horribly, like death. I called the vet and was told this was normal. Yesterday, I gave Finn his last round of medicine. He has not gained the weight back, and the smell is still there, but he is more active. He eats slow, but it doesn't appear to be painful. Today, there is discoloration on his lower jaw, possible blood above his eye (it's much darker than the porphyrin) and he looks terribly ill. I've called the vet again, but at this point his bills are getting quite high, and I'm not sure he is actually benefiting from the treatment. From reading the forums, there seems to be a slew of possible things causing his symptoms. At this point, I'm not sure knowing which it is will help. My questions: Has someone experienced this and has advice about helping Finn get better? How can I help his healing process? Should it smell like rotten tissue a week after draining? My wife has suggested euthanasia to keep him from suffering, but what if he can heal this? Starvation is a serious concern, but other than weight loss, he doesn't seem to be in pain. I don't see the need to cut his time short if he is not, in fact, suffering. Should he be separated from our other rats? (Vet did not have guidance on this point) Sorry for the long post. I'm a relatively new rat owner, and I'm at a loss as to how to help my little guy.