FRONTLINE SPOT ON Flea, Tick & Lice Treatment For S,M,L,XL Dogs & Cats (AVM-GSL) For Small, Medium, Large & Extra Large Dogs & Cats Available in pack of 1, 3 or 6 - Multi Variation Listing - Please choose from drop down menu.   How it helps your pet: Kill fleas on your pet within 24 hours Kill ticks on your pet within 48 hours Kills biting lice Helps protect against flea and tick re-infestation Fleas and ticks are nasty parasites that can transmit diseases and your pet can pick them up in various places. Frontline Spot On is an easy-to-use flea and tick product. Used monthly, it helps keep your dog protected from fleas and ticks, and the diseases they can transmit. Any questions? Please ask.