petformance Fly Block naturally repels FLEAS, TICKS, MOSQUITOES, AND SANDFLIES. DRY SHAMPOO FOR DOGS & CATS. Product containing Vitamin B and natural components for effective and immediate natural protection. From Petformance research comes the new line of insect repellents that help prevent filariasis and leishmaniasis, keeping sandflies, mosquitoes, fleas, and ticks away from our dogs and cats thanks to the effectiveness of the best natural ingredients. The product is non-toxic