Simparica TRIO treat dogs for fleas, ticks, heartworm, roundworms and hookworms. We sell Simparica TRIO tablets in 3 packs (3 months), 6 packs (6 months) and 12 packs (12 months). Each chewable tablet will treat your dog for 1 month at a time. It can be used on puppies from 8 weeks of age. Purchase Simparica TRIO for dogs at the cheapest price online. Only available for sale to Australian customers.