The most important tick disease in dogs symptoms to watch for include fever, low energy, appetite changes, limping or painful joints, swollen lymph nodes, unusual bruising or bleeding, and other signs of illness. Tick-borne diseases can also be present without obvious symptoms, so a tick exposure, or a change in your dog’s health, may be a good reason to ask your veterinarian about testing.
And don’t assume the risk ends with summer. Ticks can remain active through fall, so autumn is a smart time to stay vigilant and talk with your veterinarian about screening.
What is tick-borne disease in dogs?
“Tick-borne disease” refers to illnesses caused by organisms that ticks can transmit while feeding. In dogs, common examples include Lyme disease, ehrlichiosis, and anaplasmosis. Different ticks and diseases occur in different regions, and their symptoms can overlap.
That overlap matters: you can’t identify the specific disease by symptoms alone. Some infected dogs may not show noticeable signs, while others become ill. The Companion Animal Parasite Council (CAPC) notes that many dogs exposed to the bacteria that cause Lyme disease never develop visible illness.
What tick disease in dogs symptoms should you watch for?
Signs may appear after a tick bite, but you may not have seen a tick, or noticed the bite. Keep an eye out for the following changes, especially if your dog spends time outdoors or lives in an area where ticks are common.
1. Does your dog have a fever?
A fever can be a sign that your dog’s body is responding to infection or inflammation. You might notice that your dog seems unusually unwell, but touch alone can’t reliably tell you whether they have a fever. If you’re concerned, contact your veterinarian for advice on checking their temperature and deciding what to do next.
2. Is your dog unusually tired or weak?
A dog who’s less interested in walks, play, or everyday routines may be feeling unwell. Lethargy and weakness can occur with tick-borne illnesses, but they can also have many other causes. Pay attention to changes that persist or appear alongside other signs.
3. Has your dog’s appetite changed?
Eating less, or refusing food, can be an early clue that something is wrong. Make note of when the change started and whether your dog is also drinking differently, losing weight, or showing low energy. Share these details with your veterinarian.
4. Is your dog limping or moving stiffly?
Lameness, stiffness, or reluctance to move can accompany Lyme disease and other tick-borne illnesses. Some dogs may seem sore in more than one leg over time, a pattern often described as “shifting-leg” lameness. Joint pain can have other causes, too, so a veterinary assessment is needed to understand what’s behind it.
5. Do your dog’s lymph nodes seem enlarged?
Lymph nodes are small structures involved in the immune system. When they become enlarged, it can signal that the body is responding to illness. You may not notice this sign at home, but your veterinarian can check for it during an examination.
6. Have you noticed bruising, bleeding, or pale gums?
Some tick-borne infections can affect platelets, the blood components that help blood clot. Unexplained bruising, tiny red or purple spots on the skin or gums, bleeding, or pale gums deserve prompt veterinary attention. Call your veterinarian promptly if you notice these signs, and seek urgent care for uncontrolled bleeding, collapse, or marked weakness.
7. Is your dog showing other changes, like vomiting or unusual thirst?
Vomiting, weight loss, eye changes, increased thirst or urination, or breathing or neurologic changes can happen with a range of health problems. They aren’t specific to tick disease, but they should not be ignored. Particularly when they appear with fever, weakness, or limping.
Seek urgent veterinary care if your dog has trouble breathing, collapses, has a seizure, shows uncontrolled bleeding, or becomes severely weak. A test kit is not a substitute for urgent care when your pet is ill.
Can a dog have tick disease without obvious symptoms?
Yes. Some dogs show few or no outward signs after exposure, especially early on. That’s one reason a tick check alone can’t tell you whether your dog has been exposed to a disease.
After time outdoors, check your dog’s ears, around the collar, under the chin, between the toes, in the armpits, and beneath the tail. If you find a tick, remove it carefully and contact your veterinarian if you’re unsure what to do or have concerns. Our guide to how to remove a tick from a dog explains the basics.
Are ticks still active during fall?
They can be. Tick activity varies by species, location, and weather. Some ticks are active in autumn and may remain active into winter, especially when conditions are suitable. That means tick checks and prevention shouldn’t automatically stop when summer ends. The CAPC guidance on black-legged ticks offers more information about tick activity and distribution.
Keep using tick prevention as directed by your veterinarian, check your dog after outdoor activities, and ask whether testing makes sense for your pet’s location, lifestyle, and health history.
How can a tick disease test help?
A blood test can screen for several tick-borne diseases. Affordable Pet Labs’ Tick-Borne and Heartworm Disease Panel covers heartworm, Ehrlichia, Lyme, and Anaplasma in one panel. The product page describes at-home blood collection options, including a mail-in kit and in-home collection where available; check service availability before ordering. Results are typically provided in 7–10 business days and can be shared with your veterinarian.
Testing may be helpful as part of preventive care or when you want to discuss possible exposure with your veterinarian. But results need context. Depending on the test, a positive result may indicate exposure and does not always prove that a tick-borne disease is causing your dog’s current symptoms. A negative result may not rule out a very recent exposure. Your veterinarian can recommend the right timing and determine whether additional testing or an exam is needed.
If your dog is already showing concerning symptoms, contact your veterinarian rather than waiting for screening results. Affordable Pet Labs coordinates sample collection and lab reporting; we don’t diagnose or treat pets.
What should you do if you notice these signs?
Write down what changed, when it began, and whether you’ve found any ticks. Share your dog’s recent travel or outdoor exposure and prevention history with your veterinarian. They can evaluate your pet and advise whether tick disease testing or other care is appropriate.
Being proactive doesn’t mean assuming the worst. It means noticing changes, asking questions, and taking the next step with support. With convenient at-home collection options and results you can share with your veterinarian, testing can be a less stressful way to gather useful information, especially for anxious dogs or pet parents keeping watch through tick-active fall weather.
