This is one of the reasons I just give it year round. When to start and stop isn't something I want to spend my mental energy on.
It's not a primary concern of mine, although I don't mind the protection (such as it is). Honestly it's just that our weather has been changing over the years and I don't want to futz around with thinking about "when are the mosquitoes going to stop/start THIS year?" every year or, god forbid, screw up my assessment/prediction. With how late we have had warm weather the last several years, it got to the point where I was only skipping a couple of months anyway. Such an easy and safe thing to prevent, my dogs tolerate the medications just fine, so why not.For those of you who don't give it year round -- are you worried about intestinal parasites? Do you worm monthly with another product? That's my main reason for 12 months of Interceptor. If there's another option I'd be very interested.