During the last vet trip, my vet diagnosed a bloody tumor in my rat's ear and suggested I put her down. She still has an enthusiasm for life and a huge appetite so I am not going to follow that advice. Meanwhile, what can I do to keep her ear more comfortable. It keeps growing a huge scab which I have pulled out a couple of times but of course it causes the tumor to bleed. Is that okay? Should I use some kind of oil to soften it enough to remove it regularly? Any advice would be much appreciated.