Nexgard Spectra is a highly recommended flea-tick & heartworm treatment which kills internal and external parasites in dogs such as fleas-ticks, heartworm disease, gastro-intestinal worms (roundworms, hookworms & whipworms). It comes as a beef flavored chew and contains Afoxolaner and Milbemycin Oxime as an active ingredient . It can be used for dogs from 8 weeks of age to dogs weighing 66-132 lbs. Get it Now from PetCareClub at 15% Off with Free Shipping all over USA.