[cmrdporcupine]

If you browse around pet forums, or go wild with Google, you'll find all sorts of anecdotal reports of people who claim their pets died (with all sorts of terrifying symptoms etc) soon after taking these kinds of drugs.

Take from that what you want. It's anecdotal and non-scientific. But it concerns me enough that we keep our dogs on Nexgard only during the peak of tick season and not year round like the vets seem to want to push.

There are also known genetic differences in dogs that cause some to find various anti-parasiticals (esp heartworm) to be toxic to some herding breeds (border collies, aus. sheperds). We had our border collies tested for this before putting them on medications. (https://vcacanada.com/know-your-pet/multidrug-resistance-mut...)

That said, genetic diversity is higher in dogs than it is in humans.

[zdragnar]

I was the same way, until one of my dogs got Lyme's disease. It is so, so bad.

We've also had a few warmer than usual weeks this winter, and deer ticks have been out for a month now, if not longer.

I'm at the point where I'm probably going to have them on something year round.

[cmrdporcupine]

Sorry to hear. Yeah this weird winter is super unusually warm where I am too, though we've fallen back into seasonal normals in the last week. I've been keeping an eye out for ticks, but so far nothing.

I've only ever seen deer ticks here, never black legged, but they're definitely in the area.