For over 30 years, Vet?s Best has blended natural ingredients that work together to comfort and protect your pet. Vet?s Best Flea and Tick Spot-On drops for dogs is great for monthly protection from fleas and ticks. Each dose kills and repels fleas and ticks for up to one month. Easy to open, pinch and squeeze tubes can easily be applied between dog’s shoulder blades. Made with an unique blend of certified natural oils like clove, thyme and cinnamon oils. One package contains 4 months supply. Made in the USA.