Frontline Plus protects your dog from fleas and ticks. Its long-lasting, powerful formula quickly kills pests at all stages of their lives to prevent the spread of Lyme disease and other illnesses. Each pack includes 3 doses, which lasts 3 months. Currently available for dogs that weigh 45-88 pounds and 89-132 pounds. Add 2 boxes to your cart and use coupon SAVE at checkout. 6 doses of Frontline Plus is currently selling for $75 at Petco!