Wash away pesky pests with Natural Chemistry’s De Flea Shampoo for Dogs & Puppies. Made without pyrethrin-based pesticides, this shampoo helps defeat fleas, ticks and lice on contact. Since parasites can’t build resistance, this shampoo is formulated to not lose its effectiveness. For even more convenience, this non-toxic wash can be used in conjunction with spot-on flea products, so your dog can have double the protection. Natural Chemistry’s De Flea Shampoo is proudly made in the USA to help dogs 12 weeks of age and older get the relief they need.