SENTINEL® Flavor Tabs® is the most convenient way to get 3-in-1 parasite protection against heartworm, intestinal worms and fleas. One delicious beefy flavoured tablet given once a month with a full meal, all year round is all it takes to give your dog a lifetime of protection against the most dangerous worms and fleas. SENTINEL® Flavor Tabs® are for use in dogs and puppies for the prevention of heartworm disease caused by Dirofilaria immitis, for prevention and control of flea populations, control of adult Ancylostoma caninum (hookworm), and removal and control of adult Toxocara canis, Toxascaris leonina (roundworm), and Trichuris vulpis (whipworm) infections. Lufenuron controls flea populations by preventing the development of flea eggs and does not kill adult fleas. 6 doses/pack. Click here to view our Canine Flea and Tick Product Comparison Chart.