Frontline Spray controls fleas and ticks on your pet very effectively. It kills up to 100% of existing fleas in less than 24 hours and continues killing fleas and ticks for an entire month or more. This spray is water proof, so no worries even if your pet gets wet in the rain or has a bath. The spray still continues to work on cats and dogs of 8 weeks and above of age .Effective in controlling the problems created by sarcoptic mange. This spray also works against deer ticks (the major carrier of Lyme disease).