For dog, puppy, cat and kitten. Repels and prevents flea, ticks and biting insects for up to 4 moths. Contains vitamin B2 which favor skin health and makes the animals hair beautiful and shinny. Collar effective even when wet. Eliminate fleas and ticks in any stage of their life cycle-adult; larvae and nymphs. HOBO Collars does not adversely affect the scent of the dog and cat. Harmless to puppies and kittens.