"I walk off leash with my 2 dogs in the woods alot. I used different products,Hartz being one of them.They all claim to kill Ticks,they don't! Fleas yes but not ticks..So I remember my vet recomending Adams spray years ago when one of my dogs ran into a nest of ticks(over a 100).It does kill them on contact.you can apply this every 9 days to your pet. but the flea infestation part of it works for up to 3 months.I highly recomend this product. I don't mind applying it 2 to 3 times a month as long as it works.unlike the other products that are a waste of money because the ticks are not effected.Hope this was helpful..."