Neem (stinks though) but kills
Wondercide brand (Cedar oil) Repels and kills
Ticks: Natural Prevention and Care - Dogs Naturally Magazine
There are also electromagnetic products that look promising. The Anibio Tic-Clip and the shoo-TAGTM
provide electromagnetic barriers which can last months or years without the need for frequent topical applications. The convenience and effectiveness appear very promising.
I have never seen Shoo-TAG mentioned here or elsewhere, so that is a surprise in this DN article...
A woman a met a few yrs ago who owns a pet supply store (franchise, so she couldn't sell), swears by the tags. The company is in Florida. She lives here, in a densely tick populated area and never uses pesticides. She had to have a friend in florida ship mail them to her as there was some kind of problem or cost tripled or something when shipped to Canada.
They also have for fleas and mosquito's. I watched a video on their site with humans who were tented in mosquito infested experiment without the tags, and then again with. Interesting.
I know Travelers Mom (who's dog Traveler passed away recently), was having trouble with fleas and trying to avoid pesticides. I had sent her the link. Not sure if she tried though. However I think she was finally able to get under control. She hasn't been on here since his passing, but I could email and ask her if you want