Can pets harbor ticks, even in the winter?

A dog with ticks sitting in the woods in the winter season.

A recent study utilized TickSpotters, a photograph-based crowdsourced surveillance program to identify a variety of tick species found on domestic pets throughout the year. The findings revealed that ticks, although typically thought to pose a health risk in the spring and summer, are present in colder months, including in the winter.

In their article, “An analysis of companion animal tick encounters as revealed by photograph-based crowdsourced data,” Kopsco and colleagues found:

“The percentage of reports of ticks found on companion animals is more than doubled in the fall and winter seasons from what was reported in the spring and summer seasons.”¹

Between January 1, 2014 and December 31, 2018, TickSpotters received  5,132 specimens from domestic animals (stated or assumed to be pets). The majority of ticks were found on dogs or cats.

50% of the ticks had been attached for 2.5 days or longer.

“Prior to uploading a photograph of the specimen to the system, instructions were provided to participants on how to take a photograph of the specimen with a size reference, proper lighting and clear focus to ensure the image highlighting the necessary anatomy to facilitate correct identification by researchers,” the authors write.

A variety of tick species were identified. Blacklegged ticks comprised 4 out of 10 of the tick species. American dog ticks, lone star ticks, and brown dog ticks were also found.

Additional findings:

  • Majority were adult ticks (9 out of 10);
  • 50% of the ticks had been attached for 2.5 days or longer;
  • Nearly 50% of the ticks were found in non-endemic states;

For example, 7.6% were from the East and West south central (AL, KY, MS, TN, AR, LA, OK, TX), 4.6% were from the Mountain area (AZ, CO, ID, MT, NM, NV, UT, WY), and 12.9% were from the Pacific area (AK, CA, HI, OR, WA).

  • More than half of the tick bites occurred in the Fall or Winter;

29% of all submissions occurred in the Fall (September-November), while 34% of all ticks  submitted occurred in the Winter months (December-February).

Since the duration of tick attachment on pets was more than 2 days, the authors raised the concern that pets are:

“not being checked regularly or thoroughly enough for ticks, or that owners are less inclined to continue use of effective tick prevention products when they believe tick activity is lower.”

Nearly 50% of the ticks were found in non-endemic states.

The authors also raised a concern for humans.

“A recent survey of pet owners found that people whose pets had a tick encounter within the past 6 months were more likely to encounter a tick themselves.”

“Crowdsourced data reveal that mostly adult ticks are detected on pets, and they are found at a point in the blood-feeding process that puts pets at heightened risk for disease transmission.”

The authors suggest, “Our findings emphasize the importance of more broadly publicizing these ticks’ seasonal activity.”

Related Articles:

Can you get ticks from pets?
Tracking ticks in Canada with digital images
How do Lyme disease vaccines work in dogs?



And this, right here, is why we never got any more pets after ours died.

I’m no expert but suddenly when I put a tick collar on our elderly dog, his health declined rapidly.  The vet told me it wasn’t the collar, but his skin and hair began falling out until he was left with something that looked like a rat tail.  Shortly after that he died of what appeared to be heart-related.  I always felt like I sent him to his Maker.

In my studies, I’ve looked high and low for a “safe” tick/flea killer for pets, knowing we are at ground zero.  To this day, I don’t believe any of them are safe.  Some are safer than others but I never felt confident in choosing something that worked but was safe.

Knowing that pet owners are at a higher risk of tick bites, we made the hard decision to be a “pet-less” household.

My best advice if you still want pets is to have a good discussion with your veterinarian on all the available products on the market – the pros and the cons.  I know Nootkatone is hopefully going to be available within a year and hopefully will be made into safe animal products.  That is one chemical I remain hopeful about.

%d bloggers like this: