2 boxes - 6-month supply 8.1 - 17  lbs Exp - Jan 2025 Convenient one-and-done monthly dosing for parasite protection Kills adult fleas before they can lay eggs Kills 4 species of ticks (black-legged ticks, brown dog ticks, American dog ticks, and lone star ticks) Effectively prevents heartworm disease Treats and controls 3 species of hookworms and 2 species of roundworms Tasty, soft beef-flavored chew that's a delight for your dog Safe for puppies as young as 8 weeks of age, weighing 4 pounds or more.