Lyme Disease in Dogs: A UK Owner's Guide

Most UK dog owners first hear about Lyme disease from an American source, which paints it as a widespread menace. The reality here is calmer: it's real, it's worth guarding against, but it's genuinely uncommon in British dogs. This guide sticks to UK facts so you know what the actual risk is and what to do about it.

How common is Lyme disease in UK dogs, really?

The honest answer is: much rarer than the scare stories suggest. Both the PDSA and Blue Cross put the figure at roughly **1.5% of UK ticks carrying the *Borrelia* bacteria that cause Lyme disease. The largest survey ever done on British dogs, the Big Tick Project, backs this up: of 4,737 ticks pulled from dogs across the country, just 2.0% tested positive** for *Borrelia burgdorferi*.

It helps to think of the risk as a funnel, because each stage cuts the odds sharply:

• Roughly a third of dogs examined in the Big Tick Project were carrying at least one tick, so tick contact itself is common.
• Only about 1-2% of those ticks actually carry *Borrelia*.
• A carrying tick has to stay attached and feeding for many hours (often cited as 24-48 hours) before it can pass the bacteria on.
• And of the dogs that do get infected, most never show any signs of illness at all — they simply carry antibodies.

That last point is the one US-focused pages tend to skip, and it's the most reassuring. A positive Lyme test in a dog usually means "exposed", not "ill". For context, UK health data records somewhere around 1,500 laboratory-confirmed human cases a year, with UKHSA estimating a similar number again go unconfirmed — this is not a rare disease in people, but it is a fairly rare *clinical* disease in dogs.

None of this means you should ignore ticks. It means your energy is far better spent on prevention and prompt removal than on worrying.

Which ticks spread it, and where the UK risk is highest

In the UK, Lyme disease is almost always spread by the **sheep or deer tick, *Ixodes ricinus***, with the hedgehog tick (*Ixodes hexagonus*) playing a smaller role. These are hardy little arachnids that climb to the tip of grass and vegetation and grab onto a passing dog — a behaviour called questing.

The four *Borrelia* genospecies found in UK ticks are *B. garinii*, *B. afzelii*, *B. burgdorferi* and *B. spielmanii*, which differ a little from the dominant American strain. It's one more reason UK guidance shouldn't be copied wholesale from US sites.

Risk is not spread evenly across the country. The recognised UK hotspots are:

| Higher-risk areas | Higher-risk habitats | | --- | --- | | The South West (Devon, Cornwall, the New Forest) | Woodland and woodland edges | | Scotland, especially the Highlands and islands | Moorland and heathland | | East Anglia and parts of southern England | Rough pasture and long grass | | Anywhere with high deer populations | Bracken, dunes and dense undergrowth |

Scotland carries a notably higher human Lyme rate than England or Wales, which tracks with its tick-rich landscapes. If you walk your dog on open moor, through bracken, or in deer country, treat tick season seriously.

When is tick season in the UK?

Classic tick season runs from spring through to early autumn, with activity peaking in spring and again in autumn. But milder winters mean ticks are increasingly active year-round, particularly in the milder south. Don't assume a January walk is tick-free — check anyway.

Signs of Lyme disease in dogs

Here's an important difference from humans: dogs do not get the tell-tale bull's-eye rash. So the visible warning sign people look for simply doesn't apply to your dog. Signs also tend to appear weeks to months after the bite, so they're easy to miss the connection with.

The classic picture, drawing on PDSA and veterinary guidance, is:

• Lameness that shifts from leg to leg — often starting in the limb nearest the original bite, then moving. This recurrent, wandering limp is the most characteristic sign.
• Swollen, painful joints
• Fever and general off-colour behaviour
• Lethargy and low energy
• Reduced appetite
• Swollen lymph nodes

A limp that comes and goes, moves between legs, and pairs with a dog who seems generally unwell is the combination that should prompt a vet visit — especially if you know your dog has had a tick.

The serious complication: Lyme nephritis

Rare but grave, Lyme nephritis is an immune-mediated kidney disease that can follow infection in a small number of dogs. It can damage the kidneys before any outward signs appear, which is why vets often check a urine sample for protein loss in Lyme-positive dogs. Signs of kidney trouble — increased thirst and urination, vomiting, weight loss, swelling — always warrant urgent veterinary attention. This complication is the real reason not to shrug Lyme off entirely.

How vets diagnose it

Diagnosis isn't a single tidy test. Your vet will weigh three things together:

1. History — has your dog been somewhere ticky, and have you found a tick? 2. Clinical signs — particularly that shifting lameness with fever. 3. Blood tests — antibody tests (such as the C6 test) can detect exposure.

The catch, and vets are upfront about this, is that a positive antibody test proves exposure, not active disease. Plenty of healthy dogs test positive having fought the bacteria off. So your vet interprets the test alongside the symptoms rather than treating a number in isolation. This nuance is exactly why a calm, UK-literate vet beats a panicked internet search.

Treatment

The good news is that Lyme disease in dogs usually responds well to treatment. The mainstay is a course of antibiotics — typically doxycycline for around four weeks (21-28 days). Many dogs perk up noticeably within 24 to 48 hours of starting, which is heartening to see.

A few practical points owners should know:

• Finish the whole course, even once your dog seems back to normal. Stopping early risks the infection lingering.
• Your vet may add anti-inflammatory pain relief for sore joints in the early days.
• Relapses can happen. Antibiotics don't always fully clear *Borrelia*, and signs occasionally return, so keep an eye out even after recovery.
• Dogs with Lyme nephritis need far more intensive care — fluids, kidney support and monitoring — and carry a more guarded outlook, which is why early treatment matters.

There is a canine Lyme vaccine in existence, but it is not routinely used or widely recommended in the UK given how low the clinical risk is here. Tick control does the heavy lifting.

Preventing Lyme disease — the part that actually matters

Everything above is why prevention beats cure. You can't stop your dog meeting ticks, but you can stop those ticks staying attached long enough to matter. Three habits cover almost all of it.

1. Use a vet-recommended tick control product. Spot-on treatments, tablets and tick collars either repel ticks or kill them quickly once they bite, well before the many hours needed to transmit *Borrelia*. Ask your vet which suits your dog and your local risk — this is the single most effective step.

2. Do a tick check after every walk in tick country. Run your hands slowly over your dog, feeling for small bumps. Ticks favour warm, sheltered spots: around the ears and eyes, under the collar, in the armpits and groin, between the toes, and around the muzzle. A tick fresh from a walk may be tiny — the size of a poppy seed — so go by feel.

3. Remove any tick promptly and properly (see below). Speed is everything; a tick removed within a few hours has essentially no chance of passing on Lyme.

Tick-safety checklist

• [ ] Tick control product up to date and suited to your area
• [ ] Hands-on tick check after walks in grass, woodland or moorland
• [ ] A proper tick removal tool in your walking kit, not just tweezers
• [ ] Keep to paths and avoid brushing through long grass and bracken in peak season
• [ ] Extra vigilance in the South West, Scotland and East Anglia
• [ ] Know your dog's normal, so you spot early lameness or lethargy

A tick tool belongs alongside the other bits every owner ends up needing — see our dog walking essentials checklist. And because ticks don't clock off in the cooler months, the same vigilance applies year-round; our winter dog walking safety checklist is worth a look for off-season walks.

How to remove a tick safely

Get this right and you dramatically cut any disease risk. Get it wrong — squeezing or stressing the tick — and you can actually increase it.

1. Use a proper tick remover (a hook or fine-tipped tool). Ordinary tweezers tend to crush the body, and blunt ones squeeze bacteria back into your dog. 2. Get right down to the skin. Slide the tool under the tick, as close to your dog's skin as you can, without pinching the flesh. 3. Twist and lift steadily. With a tick hook, a gentle rotating pull lets go cleanly. Don't yank — you want the whole tick, mouthparts included. 4. Never burn the tick, cover it in Vaseline, or drown it in oil. These old wives' remedies make the tick regurgitate into the bite, raising infection risk. 5. Clean the bite with mild antiseptic or soap and water afterwards, and wash your hands. 6. Watch the site for a week or two. A small bump is normal; spreading redness, swelling or your dog going off-colour means a vet call.

If part of the mouthparts breaks off and stays in, don't dig around — leave it, keep the area clean, and let your vet check it if it looks angry.

When to see your vet

Book an appointment if your dog:

• Develops a limp that shifts between legs, especially with a fever or low energy
• Seems generally unwell in the weeks or months after a known tick bite
• Shows swollen, painful joints or enlarged glands
• Shows any sign of kidney trouble — increased thirst, more urination, vomiting or weight loss (treat this as urgent)

You don't need to rush to the vet over a single removed tick on a healthy dog — just remove it properly and keep watch. It's the *pattern of illness* afterwards that matters.

The bottom line for UK owners

Lyme disease in dogs is worth respecting, not fearing. In Britain the risk is low, most infected dogs stay well, and the disease usually responds to antibiotics when it does appear. Solid tick control, a quick check after muddy walks, and prompt, proper tick removal will keep the odds firmly in your dog's favour. Save the American worst-case statistics for American dogs.

Sources

• PDSA – Lyme disease in dogs and cats
• UKHSA / gov.uk – Lyme borreliosis: epidemiology and surveillance
• gov.uk – Tick Surveillance Scheme (UKHSA)
• Abdullah et al. – Prevalence and distribution of Borrelia and Babesia species in ticks feeding on dogs in the U.K. (PubMed)
• University of Bristol – Big Tick Project research output
• Vet Times – The Big Tick Project: a national survey