🐾 Keep your furry friend safe and stylish! Fipronil & (s)-methoprene for maximum efficacy. Stay protected even after water play. Eliminates pests in just 24 hours! One application lasts up to 30 days. Love it or your money back within a year! Large Dog Target Waterproof Protection 24-Hour Action The Amazon Basics Flea and Tick Topical Treatment for Large Dogs is a powerful solution designed for dogs weighing 45-88 pounds. This unscented treatment starts working within 24 hours, providing up to 30 days of protection against fleas, ticks, and other pests. With a waterproof formula and a satisfaction guarantee, it's the reliable choice for pet owners who want the best for their dogs.