As the weather warms up, deer ticks that have been lying dormant over the winter are beginning their nymph life stage. This means they’re at the prime stage to bite and potentially transmit Lyme disease to you and your dogs[1,2]. Adult deer ticks can be active in the fall, winter, and early spring when ambient air temperatures exceed 40 degrees[3], so it’s important for your dog to be protected year-round.

Dog and Tick

How Do Dogs Get Lyme Disease?

Lyme disease is passed to humans and animals through bites from the small black-legged deer tick infected with Borrelia burgdorferi, a type of bacteria. Deer ticks are found in forests or grassy, wooded, marshy areas near rivers, lakes, or oceans. People or animals may be bitten by deer ticks during outdoor activities such as hiking or camping, or even while spending time in their backyards[4].

Unfortunately, Lyme disease is difficult to diagnose and treat. It can cause recurring health problems for your dog, such as arthritis, or progress to rapid kidney failure[5]. The cornerstone for Lyme disease prevention is year-round tick control, prompt tick removal, Lyme vaccination, and routine disease screening.

If you live in certain areas of the United States, your pet is at higher risk for Lyme disease. According to the CDC, 95% of Lyme disease cases were reported from 14 states: Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Virginia, and Wisconsin. A small number of cases have been reported along the West coast in California, Oregon, and Washington[5]. Additional emerging areas include Tennessee[6], Virginia[7], the Carolinas, and the Ohio River Valley[8].

If you live in these states, your pet is at increased risk for Lyme disease. If you don’t live in these states, that doesn’t mean your dog is in the clear. Tick boundaries have been shifting and expanding, so ticks that transmit Lyme disease are evident in almost every state[9]. And don’t forget about when you travel with your pets — you may be visiting a location where Lyme-carrying ticks are more common. Because of all of this, it’s important to talk with your veterinarian to see exactly what your pet’s risk is, and how they recommend protecting your pet from the disease.

What You Need to Know About the Gulf Coast Tick
Fleas, Ticks, & Heartworms
What You Need to Know About the Gulf Coast Tick
Avoiding Ticks While Hiking with Your Dog
Fleas, Ticks, & Heartworms
Avoiding Ticks While Hiking with Your Dog

Symptoms of Lyme Disease in Dogs

Symptoms of Lyme disease may not show in your dog for months. Be on the lookout for these symptoms[5]:

  • Fever
  • Loss of appetite
  • Joint swelling
  • Lameness
  • Decreased activity
  • Signs of kidney failure, such as excessive drinking or urinary accidents

If you notice any of these symptoms, see your veterinarian so your dog can be tested for Lyme disease. If they test positive, there are some things that can be done to help them, but your dog can still have lasting effects from it for life.

How Can You Protect Your Dog from Lyme Disease?

Dogs can pick up ticks while outside and bring them into the home, putting dogs and humans at risk. You can protect your dog from Lyme disease by having them on a year-round parasite preventative that protects against ticks. You can also talk to your veterinarian about a Lyme disease vaccine that protects your dog from getting the disease in the first place. Your veterinarian can advise if the vaccine is a good fit for your dog based on their lifestyle.

How to Remove a Tick from Your Dog

The best way to prevent it is to keep ticks from biting your dog in the first place, or at least remove or kill the ticks before they have a chance to transmit the bacteria that causes Lyme disease (which typically takes 36-48 hours of attachment[4]).

Always remember to check your dog for ticks after time spent outdoors (even if your dog is on a preventative), especially after spending time in the woods or thick grassy areas. If you spot a tick, never remove it with your fingers. Follow these steps for removal[10]:

  • Step 1: Use fine-tipped tweezers to grab the tick as close to the skin as possible (don’t squeeze — this could squeeze bacteria and other components of the tick’s saliva into your pet in the process).
  • Step 2: Using steady and even pressure, pull the tick straight up, being careful not to twist or jerk (which can cause the mouth bits to break off and remain in the skin). If the mouth breaks off, try to remove with tweezers or, if you’re unable to remove it, leave it and let it heal.
  • Step 3: Clean the bite area and your hands with soap and water or rubbing alcohol.
  • Step 4: Dispose of the tick by putting it in alcohol, placing it in a sealed container, wrapping it tightly in tape, or flushing it down the toilet.


Karen Stasiak, MSN, DVM, MSc(CMID)

Dr. Karen Stasiak is the Head of Core Diagnostics and Infectious Disease Platforms with Zoetis. She earned her DVM degree from the Ohio State University in 2001, a Master's degree in Clinical Microbiology and Infectious Disease from the University of Edinburgh in 2021, and a Master’s degree in Nursing from the University of Cincinnati in 1994. Prior to joining with Zoetis, she was in private practice for 13 years, owning a mixed animal practice in Colorado. She received additional training in Comparative Animal Medicine and worked in laboratory animal medicine at National Jewish Center for Immunology and Respiratory Medicine in Denver. She is also a neonatal nurse practitioner and worked in the newborn intensive care unit for 20 years.

  1. Deer Tick Life Cycle. Tick Encounter. Accessed March 18, 2019.
  2. J Med Entomol. 2016 March; 53(2): 250–261. doi:10.1093/jme/tjv199.
  3. Littman, M.P. (2018) ACVIM consensus updated on Lyme borreliosis in dogs and cats. JVIM; 1-17.
  4. Lyme Disease: A Pet Owner’s Guide. AVMA. Accessed March 15, 2019
  5. Lyme Disease. CDC. Accessed March 14, 2019.
  6. Hickling, G. J., Kelly, J. R., Auckland, L. D., & Hamer, S. A. (2018). Increasing Prevalence of Borrelia burgdorferi sensu stricto–Infected Blacklegged Ticks in Tennessee Valley, Tennessee, USA. Emerging Infectious Diseases, 24(9), 1713-1716.
  7. Brinkerhoff, R.J., Gilliam, W.F, & Gaines, D. (2014). Lyme Disease, Virginia, USA, 2000–2011. Emerging Infectious Diseases, Vol. 20, No. 10.
  8. Nieto, N. C., Porter, W. T., Wachara, J. C., Lowrey, T. J., Martin, L., Motyka, P. J., & Salkeld, D. J. (n.d.). Using citizen science to describe the prevalence and distribution of tick bite and exposure to tick-borne diseases in the United States.
  9. Lyme Disease Data Tables: Historical Data. CDC. Accessed March 18, 2019.
  10. Tick Removal. CDC. Accessed March 14, 2019.