Tick risk varies significantly by geographic region, season, and habitat. This calculator helps assess your dog's relative risk level.
Assess your dog's seasonal tick exposure risk by US region — and what prevention level is right for you.
Tick risk varies significantly by geographic region, season, and habitat. This calculator helps assess your dog's relative risk level.
Tick-borne diseases are among the most common and serious preventable illnesses in dogs in North America. Lyme disease, Ehrlichiosis, Anaplasmosis, and Rocky Mountain Spotted Fever are all far easier and cheaper to prevent than to treat.
Tick risk is highly geographic and seasonal, but the trend over the past two decades is toward expanding tick range and extended seasons. The black-legged tick that transmits Lyme disease has expanded its range significantly northward and westward. Year-round prevention is now recommended in most of the continental US, not just traditional tick season months.
How Lyme disease affects dogs differently from humans: Dogs rarely develop the characteristic bull's-eye rash or joint symptoms. Instead, they often show lethargy, loss of appetite, and fever 2-5 months after infection. A serious complication unique to dogs is Lyme nephritis — immune complex deposition in the kidneys causing acute kidney failure, particularly in Labrador Retrievers and Golden Retrievers. Annual 4Dx testing (screening for Lyme, Ehrlichia, Anaplasma, and heartworm simultaneously) enables early detection.
Prevention comparison: Oral chewables (Bravecto, Simparica, Nexgard) are the most reliable for most dogs — they kill ticks before disease transmission occurs (transmission typically requires 24-48 hours of attachment). Topicals (Frontline Plus, K9 Advantix) repel and kill on contact but can wash off. Collars (Seresto) provide 8 months of continuous protection and are excellent for dogs who swim frequently. Tick checks after every outdoor trip remain important even with prevention — no product is 100% effective.
Oral chewables (Bravecto, Simparica, Nexgard) are considered the most reliable, particularly for Lyme-carrying deer ticks which are small and easy to miss. Seresto collar is an excellent option for dogs who swim frequently. Discuss your dog's specific lifestyle, health history, and regional risk with your vet to choose the best product for your situation.
Lyme disease in dogs is treated with doxycycline (antibiotic) for 4 weeks, which resolves clinical symptoms in most dogs. However, the bacteria may not be completely eliminated. Dogs diagnosed with Lyme should have kidney function monitored via urinalysis and bloodwork annually, as Lyme nephritis can develop months to years after initial infection.
No — Lyme disease is not transmitted directly from dogs to humans. However, ticks that hitchhike into your home on your dog can crawl off and bite you. Your dog acts as a tick transporter, not a direct infection source. Regular tick checks on your dog after outdoor activities protect both your dog and your household.
It depends on the species. The American dog tick becomes inactive below 35F. The black-legged deer tick remains active any time temperatures are above freezing — even in winter in the Northeast. This is why year-round prevention is recommended in much of the country. Adult deer ticks are actually most active in fall and early spring.