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Nobody wants their dog to suffer from worms, so the Bayer Quad Large Dog De-Wormer provides effective at-home treatment. Designed to remove all four common worms, including tapeworm, hookworms, roundworms and whipworms, it takes the guesswork out of treating him. It comes in an easy-to-administer chewable tablet, which can either be directly fed to willing dogs, or disguised in their food. It comes from the trusted Bayer brand, and is safe for pets over three weeks of age.