I'd like to put in a plug for NexGard chewable. I used this for the first time on two of my dogs this past month.
Every year in April, we attend a highly tick invested hunt test. Last year, I found literally 45- 50 small ticks crawling in dog's hair and about 4 that attached on each dog. That was on Advantix II, I think it was called.
This year I used NexGard one week before the test. Found about 10 doped up ticks on each dog, none had attached. The next day, I checked their beds and found about 8 dead as doornail ticks on each bed. Never did have any attached.
That's a winner in my book.