My rat Nemo has a face tumor. I took her to the vet when it first showed up some weeks ago when it was pea sized hoping it was an abscess and the vet investigated but it said tumor and nothing he can do. Its been slowly growing since then. Its now ulcerated and I'm really stressed trying to figure out if I should get her put down. She's super thin, but still eating, has energy to climb around the cage and cuddle with the other two (they've gotten downright motherly and sweet to her since the tumor showed up). She also still loves cuddling and bruxes when I scritch her. How do I know when its time? I don't want her to suffer some horrible death but I don't want to deprive her of cuddles if she's still enjoying life on the whole.