Lyme disease in dogs
Lyme disease is caused by bacteria spread by ticks. Many infected dogs never get sick, but some develop joint pain, fever or kidney problems.
Last updated: October 2026 · 2 sources · see sources
Signs to watch for
- Shifting leg lameness
- Swollen joints
- Fever
- Low energy
- Loss of appetite
Trouble breathing, collapse, repeated vomiting, not peeing, or a seizure that lasts more than a few minutes needs a vet right away. See when to see a vet.
How vets diagnose it
Your vet uses a blood test (such as a 4Dx) and may run more tests to decide whether treatment is needed. [2]
How it's treated
Antibiotics like doxycycline are the main treatment. Tick prevention and vaccination help. [2]
Medicines your vet may mention: Doxycycline. We don't list doses; your vet will decide what fits your pet.
What it costs to diagnose and manage
| Item | Typical US price | Src |
|---|---|---|
| Lyme disease treatment total (PetCostVS) | $200–$500 | [1] |
These are typical US ranges from the sources listed. Your pet's costs depend on how severe things are, the tests your vet recommends, your pet's size and where you live. Ask your vet for a written estimate.
Outlook
Most dogs improve quickly with antibiotics. Lyme nephritis is rare but serious. [2]
Common questions
What is Lyme disease in dogs?
Lyme disease is caused by bacteria spread by ticks. Many infected dogs never get sick, but some develop joint pain, fever or kidney problems.
What are the signs of Lyme disease?
Common signs include: shifting leg lameness, swollen joints, fever, low energy, loss of appetite.
How do vets diagnose Lyme disease?
Your vet uses a blood test (such as a 4Dx) and may run more tests to decide whether treatment is needed.
How is Lyme disease treated?
Antibiotics like doxycycline are the main treatment. Tick prevention and vaccination help.
How much does Lyme disease cost to treat?
Lyme disease treatment total (PetCostVS): $200–$500. Costs vary with severity, tests, your pet's size and where you live.
Related
This page is general information for pet owners, not veterinary advice. Talk to your vet about your own pet.