- Increased thirst is often the first sign of feline kidney failure. You may notice that your cat is drinking water from odd places, such as from puddles or the toilet.
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The excessive drinking will, of course, cause your cat to urinate more frequently than usual. You will notice increased weight in his litter box, or that he is urinating in unusual places in your home.
- Your cat may demonstrate a reluctance to eat, or may ignore her food completely.
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An occasional bout of vomiting is normal. If, however, your cat cannot keep food down and is vomiting persistently, this could be sign of kidney failure.
- Weight loss can occur even if your cat has been eating and drinking. Watch for a downward weight fluctuation, especially if it exceeds more than 10 percent of your cat's normal weight.
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Your cat may be sleeping more than usual. He may demonstrate a slow response or a lack of interest in things that once interested or excited him.
- Your cat may seem to stumble, appear wobbly or move strangely when walking. She may demonstrate a lack of energy or the ability to jump, climb or move normally.
