Bayer Advantus Large Dogs’ Flea Tick Treatment Soft Chew – 30 count

They are a fast acting treatment of flea infestations on dogs and puppies 10 weeks of age and older weighing 4 pounds or greater. These flavored chews start killing fleas within 1 hour with just a single dose. In the event of continued infestation you can safely repeat treatment as often as once per day. Keep away from children.