My girl Tahlula (cat) passed in March of 2021. She was only 11. Indoor cat. Healthy, until she started doing this dry heaving thing a month or two before March, thought maybe a fur ball but nothing ever came up when she did this the few times she was suddenly doing it. She wasn't a cat that threw up allot. Then I noticed her usual behavior was off. She was my cat and so I would notice these things where my husband didn't. Then suddenly I noticed she stopped eating, or became more fussy. I made an appointment with the vet, which because of covid I had to wait a few weeks to get her in but it didn't seem like a huge emergency. Until about a week later. She was laying on my son's bed .. Drool was coming out of the corner of her mouth and she felt warm so I immediately got her into the vet. Her blood work was bad and she had a fever. Dr thought maybe cancer. They put her on a antibiotic and I took her home. She didn't really improve and still wasn't eating. Took her back the next Tuesday, they did an x-ray. Couldn't find anything, took her for an ultrasound still couldn't find anything. Put her on a Prednisone, didn't do anything for her. I syringed blended watered down food into her and also baby food. She just was lying on my son's bed. They tested her for HIV, leukemia,..I never got an answer to what was wrong with her. I was told it could be this thing, I can't even remember what it's called now, there is not medication that is legally out there. It can be bought on the black market but it's expensive and not easy to give the cat. The only way to find out if they have it is if they biopsy their tissue which would have required an operation. I made the decision to say goodbye to her. Now I'm left not knowing what was wrong and all these what ifs. I feel like I gave up on her to soon. It feels like just yesterday it happened. I hate myself for not trying longer.... Maybe if I had just kept syringing the food into her she would have gotten better. I'm just feeling awful and needed to vent so thanks for listening. I feel I will live with this deep regret and guilt forever. It's awful.