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CloseVet's Best Urinary Tract Support (formerly known as FUS Feline Urinary Support) helps support normal, healthy urinary tract function. Contains real cranberry that helps maintain your cat's urine at a normal, healthy acidic and free-flowing level. Urinary tract health is critical for your cat's well-being. Good acidic urinary flow flushes toxins, impurities and excessive mineral deposits out of the body. Made in USA.