I had a female zebra finch for 4 years. Some weeks ago, I noticed some dark discoloration and swelling around her rear (I have been checking her rear every day ever since we had to put another female down because of a prolapse..). We have found a vet around 2 years ago, probably the only one in a 50km radius from where I live who specializes in birds, however I have visited him twice with her last year when she seemed sick and he said she was fine so I was afraid this time would be the same and I would just be pointlessly stressing her (and he is also hard to reach..). Well the bloating has gotten bad this friday, and she started looking very ill but she was still eating and drinking and her friend was taking care of her. I was afraid of the worst, so I wanted to give her two more days with her friend. After calling him yesterday, we were finally able to get an appointment, and what I feared the most turned out to be true - it was a tumor.. So he euthanized her. He said the tumor was pushing on her intestines. Almost every vet here (in Slovakia) seems to only work on dogs and cats. However I am the one that failed her. I am not sure about finches, but maybe he would have been able to operate on her and remove it.. Now I have started considering some things because I have never felt this bad inside. My baby, I am sorry..