Purina Pro Plan LiveClear Dry Cat Food was evaluated by the scientists at the labs of the Good Housekeeping Institute. These independent experts reviewed the LiveClear product for effectiveness. They also reviewed the packaging and marketing for truth and accuracy. But the Good Housekeeping Seal is not only prestigious. It also comes with a 2-year limited warranty from Good Housekeeping to back it up. If any product that bears the Good Housekeeping limited Seal proves to be defective within two years from the date it was first sold to a consumer by an authorized retailer, Good Housekeeping, will refund the purchase price (up to $2,000), whichever is less or, at Good Housekeeping’s sole discretion, repair or replace the product.