I have had many pets including cats over the years and we have always treated like members of the family. That meant we paid the vet bills to keep the healthy. Once we had a 60 dollar vet bill for a hamster. If your kitten can be saved, then yes do so. But don't be afraid to let the Vet put the kitten out of it's pain either if it is hopeless. I lost both my cat and my dog with in a year of each other. Both times I had to let put them down rather having them suffer. Both were old, my cat 20 years old when he died. It was one of the hardest things that I have ever had to do. But I couldn't let them suffer to easy my own pain at making the choice.