I've used many flea and tick pills/topicals, including frontline plus. In my opinion, frontline does not do its job. When my dogs were on this, fleas and ticks were not prevented and did not go away. I'm not a fan of topicals in general because baths make them less effective. Also, I feel as if the topicals can be rather toxic. I always worry about about my dogs licking each other/themselves and the reactions to follow. My dogs are currently on Bravecto + and I've never once saw a flea or tick on either one of them (and the pill form is so much easier + lasts 3 months). This can be a more expensive option, but very worth it.