Q. Cat eats a lot is thin behaviour is different than normal.Will not use litter box. Female about 15 yrs old no problem with urination or bowel

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A. There are a number of reasons why older cats will lose weight and with a good appetite diabetes and thyroid disease would be high on the list of suspects. I recommend a blood and urine panel to rule out hormone, kidney and liver issues all of which could result in altered behavior, thirst and body condition

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