The Three Musketeers. Huey, Dewey and Louie. Charlies Angels! They're all iconic trios. But now there's a new trio in town. Say hello to Simparica Trio. With its clever combo of three optimised ingredients, these chews are everything you need to protect your dog from fleas and ticks, intestinal worms and even heartworm!Best of all? Simparica Trio chews have a tasty liver flavour that's designed to appeal to dogs' taste buds, so treating your dog every month doesn't have to be a huge drama.