Happy Jack DD-33 Flea & Tick Spray is a new formula that contains two active ingredients which kills fleas and ticks instantly and keeps them off for weeks. DD-33 is water based (unlike similar sprays which are up to 40% alcohol) and therefore gentle to the skin and hair. Formulated for minimum toxicity to dogs and cats, including the most sensitive breeds. Easy to use trigger sprayer eliminates fleas and ticks without aerosol noise trauma or solvent irritation.