All-in-One Monthly Parasite ProtectionSentinel Spectrum Chews provide powerful, vet approved protection against six major internal and external parasites all in one tasty, beef flavored monthly chew. Trusted by veterinarians and pet parents alike, Sentinel Spectrum is designed for year round protection against heartworms, fleas, and a full range of intestinal worms Formulated with milbemycin oxime, praziquantel, and lufenuron, this all in one preventative targets the life cycle of