- Jul 26, 2010
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My vet told me that while it might be hairball, that a lot of cats throw up because their kidneys are damaged. They get an infection, sometimes in the gum or teeth, and the infection gets in the body and injures their kidneys. So there's another possibility. Our cat got a bad infection and sure enough her kidneys were really badly damaged. She did survive a long time. You can ask the vet about a 'kidney diet' food that is easier to digest.