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	Take great care of your best friend. We have all the products you need to keep your pet happy and healthy. Our friendly customer service department can answer any questions. Call Us at      205-621-7687	back to information home page                                     Chronic Renal Failure? Chronic renal failure (CRF, or "chronic kidney failure", CKF, or "chronic kidney disease", CKD) is a slowly progressive loss of renal function over a period of months or years and defined as an abnormally low glomerular filtration rate, which is usually determined indirectly by the creatinine level in blood serum