I use k9Advantix II (topical monthly) on my dogs, but only during the summer. Heartworm pills every 6 weeks (not 4) during warm months, yearly testing, careful checking and avoidance of all tall grass, brush and woods.
I also use Brewers yeast/garlic supplements as they are supposed to deter bugs, plus natural spray repellents.
I would not use an oral agent, wish I didn’t have to use anything, but the ticks are bad in my area. They all are pesticides/poisons.
I have heard terrible things about this product http://vitalanimal.com/trifexis-hoax/
