the skin. Gentle enough for cats and kittens 8 weeks of age and older. Precautions.......... 12-doses For use on cats and kittens only. For external use only. Do not use on kittens less than 8 weeks of age or weighing less than 1.8 lbs. Always read, understand and follow the label and use directions. Important Information Fleas rise to the top of your pet's coat as they die, so consider it a triumph if you start seeing more fleas at first, after treating your pet. If you’re still seeing fleas after application, it may be because your pet has picked up new fleas from the environment, which may include other pets, surfaces and outdoor areas. It may take up to 30 days to break the entire flea life cycle. Additionally, you should also treat sources of new fleas (i.e., carpet, yard, etc.) to ensure complete flea control.