Cats have four stages of kidney failure, starting at stage one, or kidney insufficiency, and progressing to end-stage kidney failure in stage four, states All Feline Hospital. At stage one, kidney function is 33 percent ... More »

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Kidney disease ascends in severity from Stage 1 to Stage 5, according to The Renal Association. Kidney function is typically normal in Stage 1, while reducing mildly in function by Stage 2. More »

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According to The Renal Association, a patient is diagnosed with stage 5 kidney disease when kidney function falls to a level below 15 percent. Stage 5 kidney disease is also referred to as end-stage kidney disease becaus... More »

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Weight loss, vomiting, increased intake of water, increased urination and decreased appetite are signs of kidney failure in cats, according to Cornell University College of Veterinary Medicine. Mouth ulcers, bad breath, ... More »

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Blood in urine is a sign of kidney failure in cats, WebMD explains. Liver failure is accompanied by blood in the stool, according to PetMD. More »

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Signs of kidney failure and thyroid problems in older cats include frequent urination, diarrhea, bloody urine, excessive thirst and hyperactivity, states WebMD. Older cats are more likely to develop chronic kidney proble... More »

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The toxic effects of ibuprofen on cats include damage to the stomach and kidneys that may lead to kidney failure, severe stomach irritation and stomach ulcers, according to Vetstreet. Ibuprofen inhibits blood flow to the... More »

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