Lyme Infection in Dogs
Infection in dogs rarely starts with obvious injury, sudden change in behavior, or a clear signal that something went wrong. In many cases, exposure happens during ordinary parts of a dog’s day: a walk around the block, playtime in the yard, or a quick stop at the park. When symptoms develop, they are often mild and nonspecific, including intermittent lameness, joint stiffness, or reduced energy.
That ordinariness is what makes Lyme infection easy to underestimate. When you understand how Lyme infection spreads and why signs can appear later, prevention becomes a calm, practical routine of everyday care.
How Do Dogs Get Lyme Disease?
Dogs get Lyme disease through the bite of an infected tick, most commonly the black-legged tick. When a tick carrying Lyme-causing bacteria attaches and feeds, it can transmit the bacteria to the dog.
Ticks are small, persistent, and good at going unnoticed. Dogs may pick them up during short outdoor activities, even in places that don’t feel particularly “tick heavy.” Lawns, trails, parks, and shared green spaces can all be sources of exposure.
A helpful way to think about Lyme risk is this: it’s driven by where dogs move, not how extreme the environment feels. Everyday spaces can still carry ticks.
How Common Is Lyme Disease in Dogs?
Lyme disease is diagnosed in dogs every year, with roughly 5-10 percent of dogs in high-risk regions testing positive for exposure. Veterinarians consider it common enough to plan around. Some dogs are exposed without ever becoming ill, while others develop symptoms later, which can make Lyme disease feel unpredictable.
Veterinarians often see Lyme disease in dogs whose owners believed their risk was low. Travel, changing tick habitats, and inconsistent prevention all contribute. Because exposure can happen quietly, prevention is key, as treatment once symptoms appear become more difficult.
What Are the Signs of Lyme Disease in Dogs?
Lyme disease does not follow a strict timeline. Some dogs develop signs weeks or months after exposure, while others never show obvious symptoms.
When signs do appear, they may include:
- Limping or lameness that may shift between legs
- Joint swelling or stiffness
- Fever
- Fatigue or reduced activity
- Loss of appetite
These signs overlap with many other conditions, which is why Lyme disease can be difficult to identify based on symptoms alone. If a dog shows unexplained lameness or joint pain and lives in or travels to tick-prone areas, veterinarians often consider Lyme testing as part of the evaluation.
How Do Veterinarians Diagnose Lyme Disease?
Veterinarians typically diagnose Lyme disease using blood tests that detect exposure to Lyme-causing bacteria. Testing may be part of routine wellness care, especially for dogs that live in or travel to areas where ticks are common.
Results are interpreted alongside a dog’s health history and current signs. From there, veterinarians can recommend monitoring, treatment, or adjustments to preventive care as needed.
Can Lyme Disease in Dogs Be Prevented?
Yes. Preventing Lyme disease focuses on reducing tick exposure before infection has a chance to occur. Many veterinarians recommend consistent tick protection as part of routine care for dogs that spend time outdoors.
Year around tick protection is recommended for all dogs from the CDC and AVMA. Products like NexGard® PLUS (afoxolaner, moxidectin, and pyrantel chewable tablets) are commonly prescribed to help protect dogs against ticks, fleas, Heartworm disease, hookworms, and roundworms when used consistently and as directed by a veterinarian.
Simple habits help, too. Checking your dog for ticks after outdoor time and keeping grass trimmed can reduce exposure in everyday environments.
What Should You Do If You’re Concerned About Lyme Disease?
If Lyme disease is on your mind, a conversation with your veterinarian can help put risk into context. They can assess your dog’s exposure, recommend testing when appropriate, and guide you toward a prevention plan that fits your routine.
Lyme disease can be serious, but it’s also manageable. With awareness, regular veterinary care, and consistent prevention, staying ahead of Lyme disease becomes part of everyday dog ownership.
Frequently Asked Questions
Can dogs get Lyme disease without going into the woods?
Can dogs get Lyme disease without going into the woods?
Yes. Ticks can live in yards, parks, and other common outdoor spaces.
Do all dogs with Lyme disease show symptoms?
Do all dogs with Lyme disease show symptoms?
No. Some dogs may be exposed without developing noticeable signs.
Is Lyme disease dangerous for dogs?
Is Lyme disease dangerous for dogs?
Lyme disease can lead to complications if left untreated, but prevention and early care greatly reduce risk.
Tick Protection Tips for Dogs
All dogs are at risk of tick bites. A single tick bite can lead to multiple health concerns. This is why it’s so important to be proactive and do everything you can to reduce your dog’s risk of tick exposure as well as provide the monthly, year-round protection of either NexGard® PLUS (afoxolaner, moxidectin, and pyrantel chewable tablets) or NexGard® (afoxolaner).
Tick Questions for Dogs
If you are proactive with monthly, year-round protection of either NexGard® PLUS (afoxolaner, moxidectin, and pyrantel chewable tablets) or NexGard (afoxolaner), you can help minimize the risk of ticks on your dog.
Your Pet Deserves Tick Protection
There are several species of ticks, and most can be vectors of dangerous diseases. When a tick gets on a pet, it crawls under the animal’s fur and attaches to the skin. This makes them difficult to spot. The longer a tick feeds on a pet, the greater the likelihood of disease transmission, so daily checks are recommended to reduce the risk. Remember to consult with your veterinarian about other ways to protect your pet.
Important Safety Information
NexGard® PLUS (afoxolaner, moxidectin, and pyrantel chewable tablets) is safe for puppies at 8 weeks, weighing 4 pounds or more. The most frequently reported adverse reactions include diarrhea, vomiting, lethargy, and itching. Use with caution in dogs with a history of seizures or neurologic disorders. Dogs should be tested for existing heartworm infection prior to starting a preventive. For more information, click here for full prescribing information.