Simparica Chewable Tablets for Dogs. Fast acting and safe monthly flea and tick protection. Simparica tablets start killing fleas within 3 hours and ticks within 8 hours and lasts for 35 days.
Stronghold 360mg Spot-On Flea Control Solution for Extra Large Dogs. Treats and prevents infestations of parasites that live on the skin or in the fur, such as fleas and mites. Also treats worm parasites that live inside the body.