Aristopet Flea & Tick Shampoo for Dogs, Cats, Puppies & Kittens is a gentle acting insecticidal shampoo containing natural pyrethrins to control fleas and aid in the control of adult brown ticks. Does not control paralysis tick. Aristopet Flea & Tick Shampoo for Dogs, Cats, Puppies & Kittens is a gentle acting insecticidal shampoo containing natural pyrethrins to control fleas and aid in the control of adult brown ticks. Does not control paralysis tick. Pyrethrins are extracted from chrysanthemum flowers and act as a rapid knockdown contact poison to control fleas and aid in the control of ticks, but have a very low toxicity to the animal host. Piperyonyl butoxide increases the effectiveness of pyrethrins. This product will eliminate fleas from dogs and cats. Prevent reinfestation by treating kennels, bedding and surrounding areas simultaneously with Aristopet Flea & Tick Rinse Concentrate or similar suitable registered product.