Dog ticks gone completely

It's been 2 years since I started the war. This was a desperate war, the ticks were everywhere, even high on the ceilings and occasionally on my bed. I've tried many ways to get rid the ticks: spray, manually taking it day-in-day-out, vet injecting the dogs with anti ticks, special shampoo, medicated collar etc. Now, the ticks has completely gone from the environment of my house, the dogs sleep peacefully, their face contentedly saying thank you all the time, so beautiful.

The weapon was deltamethrin or so it says on the label, it was in the form of "magic chalk". It is easily obtained in Indonesia and cheap. I was very apprehensive at the beginning, afraid that it might be toxic to the dogs and humans. Indeed, there were 2 incidences when the dogs ate it, they didn't sick a bit, however. There was one time when perhaps the dog ate it too much, he threw it up but didn't show any sign of sickness.

So this is what I did:
Applied the chalk on the floor (draw a line with the chalk where the floor meets the wall), this is only at places where the dogs roam and sleep. The dogs play at the yard, but there is no way I can apply the chalk at the yard.

Apparently it took about one year for a full tick removal, the dogs brought the ticks from the yard but the residue of the chalk on their fur were still able to kill tick even after a month of applying the chalk to the dogs sleeping area. You will need to apply the chalk every 3 month and let it there for 2 days.

I believe the tick is "brown dog tick" or Rhipicephalus sanguineus

Try it. There is a bonus of this chalk. Cockroach that passes the chalk-line will be dead in less than 30 minutes.

Oh, I heard that magic chalk containing deltamethrin is illegal in US, but you can still find it in chinatown, however. It might be called Ant Chalk. It's illegal probably because no company has register it for home use in US, but I found it perfectly safe after checking Deltamethrin's MSDS. You can also find its information in wikipedia.