Dogs with Lyme disease are treated with a course of antibiotics, typically lasting 30 days, along with anti-inflammatory pain relief if they’re showing joint pain or lameness. Most dogs improve noticeably within the first few days of starting antibiotics, though finishing the full course is essential. Here’s what treatment looks like and what you can do to support your dog’s recovery.
Antibiotics: The Core Treatment
Doxycycline is the first-choice antibiotic for Lyme disease in dogs. It’s given once or twice daily for 30 days. Veterinary specialists prefer it not only because it works well against the Lyme-causing bacteria, but because it also covers other tick-borne infections your dog may have picked up at the same time, like anaplasmosis or ehrlichiosis. It also has mild anti-inflammatory properties on its own, which helps with the joint swelling that Lyme disease often causes.
Some dogs don’t tolerate doxycycline well. It can cause nausea, vomiting, or loss of appetite, especially on an empty stomach. Giving it with a small amount of food usually helps. If your dog still struggles with it, your vet has alternatives. Amoxicillin given three times daily for 30 days is one option, particularly for puppies or growing dogs. Another option is a long-acting injectable antibiotic that requires just two shots given 14 days apart, which has been shown to work as well as a full month of oral antibiotics. That injectable route is especially useful for dogs that refuse pills or vomit them up.
Pain Relief for Joint Swelling
Lyme disease in dogs most commonly shows up as shifting leg lameness, where your dog may limp on one leg for a day or two, then seem fine, then limp on a different leg. The joints become swollen and painful. While the antibiotics address the underlying infection, your vet will often prescribe an anti-inflammatory pain reliever to keep your dog comfortable during recovery.
Several FDA-approved options exist for dogs, including carprofen, meloxicam, firocoxib, and grapiprant. These reduce inflammation in the joints and relieve pain. They’re prescription medications, not something you should substitute with human painkillers. Over-the-counter drugs like ibuprofen and naproxen are toxic to dogs, even in small amounts. Aspirin can cause stomach ulcers. Stick with what your vet prescribes and give it exactly as directed.
What to Expect During Recovery
Most dogs with Lyme arthritis start to perk up within 24 to 48 hours of beginning antibiotics. The lameness and lethargy typically improve rapidly in the first week. This fast improvement can be tempting to read as a sign that your dog is cured, but stopping antibiotics early allows the bacteria to survive and potentially cause a relapse. The full 30-day course matters.
If your dog isn’t showing clear improvement within three to five days, that’s worth a follow-up call to your vet. Lack of response could mean the diagnosis needs revisiting or that a complication is developing. Your vet may also want to recheck antibody levels after treatment to confirm the infection is resolving.
Feeding and Supporting a Recovering Dog
Dogs with Lyme disease often lose their appetite, especially in the first few days when they’re feeling the worst and the antibiotics are kicking in. Offering smaller, more frequent meals can help. Warming the food slightly or mixing in a spoonful of low-sodium broth may make it more appealing. The goal is simply to keep your dog eating and hydrated while the antibiotics do their work.
Omega-3 fatty acids from fish oil are sometimes recommended as a supplement during recovery. They have natural anti-inflammatory effects that may help with joint inflammation. Your vet can suggest an appropriate amount based on your dog’s size. Beyond that, no special diet is needed for straightforward Lyme arthritis cases. Just feed your dog their regular, nutritionally complete food.
Rest is equally important. Limit vigorous exercise while your dog is still limping or seems stiff. Short, gentle walks are fine, but hold off on runs, fetch, and rough play until the lameness resolves.
When Lyme Disease Affects the Kidneys
A small percentage of dogs with Lyme disease develop a serious kidney complication called Lyme nephritis, where the immune response to the infection damages the kidneys and causes them to leak protein. This is far more severe than Lyme arthritis and requires hospitalization. Treatment involves IV fluids, medications to manage blood pressure and protein loss, anti-nausea drugs, nutritional support, antibiotics, and immune-suppressing drugs. Dogs with kidney involvement may also be placed on a protein- and phosphorus-restricted diet as part of long-term management.
Signs that suggest kidney involvement include sudden loss of appetite, vomiting, increased thirst and urination, weight loss, or swelling in the legs or face. Certain breeds, particularly Labrador Retrievers and Golden Retrievers, appear more susceptible. If your dog has been diagnosed with Lyme disease and develops any of these signs, that warrants urgent veterinary attention.
Preventing Reinfection
Having Lyme disease once doesn’t protect your dog from getting it again. After your dog recovers, preventing future tick bites becomes the priority. Year-round tick preventatives are the most reliable approach. Options include monthly chewable tablets and topical treatments, as well as longer-lasting chewables that provide protection for up to 12 weeks. Your vet can recommend the best fit based on your dog’s size, health, and lifestyle.
A Lyme disease vaccine is also available for dogs who live in or travel to areas where infected ticks are common. It’s not universally recommended, but for dogs with high exposure risk, it adds another layer of protection on top of tick preventatives. Daily tick checks after outdoor time help too. Ticks generally need to be attached for 24 to 48 hours before they transmit the Lyme bacteria, so finding and removing them quickly reduces the chance of infection.