William Oakwood Flea and Tick Chew for Large Dogs 20 to 40kgWilliam Oakwood Flea and Tick Chews provide effective treatment, control, and prevention of flea and tick infestations in large dogs. Each chew delivers up to 3 months of protection, helping keep your dog comfortable and parasite free. The active ingredient fluralaner works quickly to kill fleas and ticks and continues protecting your dog for up to twelve weeks. The chewable tablet is easy to administer and removes the stress of monthly spot on