Monthly treatment with Sentinel Spectrum Tasty Chews for dogs will prevent heartworm(Dirofilaria) infection. It controls adult roundworm(trichuris vulpis), adult hookworm (Ancylostoma caninum), adult tapeworm (echinococcus granulosus, taenia piriformis, Dipylidium caninum) infection. Sentinel also provides long term protection and control of flea (Ctenocephalides felis) infestations and control of flea allergy dermatitis in dogs. It does not kill adult fleas. Sentinel Spectrum Tasty Chews are the most convenient way to protect against the most common and dangerous parasites.