This product enables you to give your dog a broad-spectrum protection against heartworms, fleas, and intestinal parasites for a very reasonable cost. The ingredient Lufenuron breaks the life cycle of the flea, preventing flea populations from infesting both your pet and the environment. Sentinel® Flavor Tabs® also prevent infection with the most common intestinal parasites - roundworms, hookworms and whipworms. This protects your pet as well as your family. Please contact our office at 407-366-4486 for more information. One of our team members will be happy to set aside a package for your pet!