I would recommend you consider oral tick control medication. There are some good varieties out there. Some do ticks and fleas, some even do ticks, fleas, and mosquitos. I'm sure there is a Vet on the forum who can tell you more about the pros and cons of each. I pursued oral to avoid the hassle of topicals. So I now have a heart worm chewable and a flea/tick chewable. Dog loves the taste, owner is happy.
They are expensive and most require a script from your vet. I did find you can purchase online at quite a discount.
