I used to use Advantix, but found that it made him Dylan itch, he was always rubbing his back along the wall (and our walls are all pale, so he left dirty streaks). Last year I used Billy no mates, and there were no issues with itching. In previous years I would be removing ticks almost every day (we are in Scotland, in the country, with deer, rabbits (when the neighbour isn't shooting them 🤬) all sorts of wildlife). With the BNM last year I removed about six through the whole summer, and they came off easily as if they were sort of zonked, and not deeply buried. I was very impressed with it, and am using again this year. A teaspoon of the powder, which smells wonderful, goes in his food, he eats it with no problem. I'm much happier using it than the chemicals.
BTW, I thought garlic was not good for dogs, it's the onion family?
Lesley and Dylan