Simparica Trio is a tasty, chewable monthly treat that dogs love to eat, with or without food. It kills fleas fast and lasts for the full month, eliminating fleas before they can lay eggs. Effective flea killing action is also an essential component of flea tapeworm control. Simparica Trio has persistent tick killing activity for 35 days and a single dose treats and controls hookworms and roundworms – including larval stages. Being a tasty chew, dogs can go swimming or be bathed before and after administration. Simparica Trio is the flea tick and worm treatment that goes down a treat.