The sub Q fluids will keep her hydrated, that's a good thing. Will it cure her? No. It will make her more comfortable. I did sub Q on all my cats that have passed. It is the least expensive way to keep them home and let them live a little longer. I also fed them when they wouldn't eat. We used prescription food I fed through a syringe. NOW, that is a nightmare at times because cats really hate that. None of my cats hated the sub Q fluids because it was virtually painless to them.

You have to do what's good for you. If your cat is still eating, maybe try the softer cat food and only give a little bit at a time to see how she holds it down. More than likely she's vomiting from dehydration as well as kidney failure. Is she happy? Is she still purring? I hate to say it but they will do that until the end. You know her better than we do. I could tell when it was time with all my past fur babies.

It's a tough call and you have to look at what you can afford and the time you have to do such a venture. One of my cats never recovered and sub Q was only getting him by. As soon as I stopped he went back down. The vet suspected cancer so we put him to sleep. The other two lived several years and had some good and bad times. No one knows the right answer in this type of situation. Go with your gut.