Sorry to say Revolution is a poor drug for ticks.
Fine for everything else like heartworm and fleas.
3 good meds for ticks for dogs.
K9 Advantix
Nexguard
Bravecto.
Should start in spring as soon as temps increase above about 4C.
Keep going till late fall until temps stay below 4C.
Ticks are more active in spring and fall than mid summer.
For people, cover up in the woods/tall grass.
Check yourselves over end of day. Top to bottom.
You won't feel a tick bite or if a tick is attached. They stay on for 4-6 days.
Lyme disease transmission requires the tick be attached for 24 hrs or more. Prompt removal is key.
Grab it by the head with some tweezers immediately next to your skin and pull straight out.
Do not grab it with your fingers. You'll just squeeze bad germs into you.
Ticks are nothing to fool with.
The worse spots in Ontario are Prince Edward County east to Montreal. The north shore of Lake Erie. Lots of ticks elsewhere but less Lyme disease.
Hope this helps.
Be safe.