MilbeGuard is a once a month meat-free, beef flavored tablet used for the prevention of heartworm disease and the control of roundworms, hookworms and whipworms in dogs and roundworms and hookworms in cats. Dogs should be tested for heartworm prior to use. For use in dogs 4 weeks of age and older weighing at least 2 pounds and for cats 6 weeks of age and older weighing at least 1.5 pounds.