Preventing Tick Diseases in Dogs: UK Guide for May to July

Why Tick Prevention Matters for Dogs in the UK

Tick-borne diseases pose a growing concern for dog owners across Britain. Research supported by the UK Health Security Agency (UKHSA) Tick Surveillance Scheme has documented a steady expansion of Ixodes ricinus records since 2012, with the greatest increases observed in southern and eastern England. Studies suggest that around 15% of UK dogs may carry ticks at any given time, and surveys conducted in veterinary practices during summer months have found ticks on roughly a third of dogs presented for any reason.

The period from May through July is particularly critical. Warmer temperatures and longer daylight hours drive both nymph and adult tick populations to peak activity levels. The UK's temperate maritime climate, with its mild, wet springs, creates ideal conditions for ticks in many regions. Owners who treat prevention as a sustained commitment rather than a seasonal reaction tend to see the best outcomes for their dogs' long-term health.

Left undetected or untreated, tick-borne infections can cause chronic joint problems, kidney damage, blood disorders, and in severe cases, can be fatal. If your dog regularly walks in grassland, woodland, or heathland, this guide is essential reading. For dogs with mobility issues who still need gentle outdoor exercise, see also Summer Exercise for Senior Dogs With Hip Dysplasia.

Tick Species Found in the UK

Understanding which ticks are active in Britain helps owners and veterinary professionals tailor prevention strategies appropriately.

Ixodes ricinus (Sheep Tick, Deer Tick, or Castor Bean Tick)

This is by far the most widespread and significant tick species in the UK. It is found throughout England, Scotland, Wales, and Northern Ireland, with particularly high densities in areas supporting large deer populations. Known hotspot regions include the Scottish Highlands, the New Forest, Exmoor, the Lake District, the South Downs, Thetford Forest, and parts of Wales. Ixodes ricinus is the primary vector for Borrelia burgdorferi (the bacterium causing Lyme disease) and Anaplasma phagocytophilum (which causes anaplasmosis, sometimes called tick-borne fever in livestock).

Dermacentor reticulatus (Ornate Dog Tick)

Not historically native to England, Dermacentor reticulatus has become established in parts of Essex and along sections of the south-east coast. This species is the vector for Babesia canis, the parasite responsible for canine babesiosis. Cases of babesiosis in UK dogs were first confirmed in Essex and represent a significant development in the country's tick-borne disease landscape. The British Small Animal Veterinary Association (BSAVA) has highlighted these findings as a concern for animal health.

Ixodes hexagonus (Hedgehog Tick)

Commonly found on hedgehogs, foxes, and sometimes on dogs, particularly those with access to gardens frequented by hedgehogs. While less frequently implicated in disease transmission to dogs than Ixodes ricinus, it can still carry Borrelia burgdorferi.

Tick-Borne Diseases Most Relevant to UK Dogs

Lyme Disease (Borreliosis)

Lyme disease is the most significant tick-borne illness affecting dogs in Britain. Caused by Borrelia burgdorferi sensu lato and transmitted by Ixodes ricinus, the bacterium typically requires the tick to be attached for 36 to 48 hours before transmission occurs. This is why daily tick checks are so valuable.

Symptoms in dogs can include:

• Episodic shifting leg lameness (lameness that moves between limbs)
• Swollen, warm joints
• Fever, lethargy, and loss of appetite
• In severe or untreated cases, Lyme nephritis: a potentially fatal kidney condition noted particularly in Labrador Retrievers, Golden Retrievers, and Bernese Mountain Dogs

Prevalence of Borrelia burgdorferi in UK tick populations varies significantly by location. Studies have found overall infection rates in Ixodes ricinus nymphs of around 5 to 6%, with individual site prevalence ranging from 0% to over 30% in certain areas such as parts of Aberdeenshire. Importantly, dogs do not develop the characteristic bullseye rash seen in human Lyme disease, making blood testing essential for diagnosis.

Canine Babesiosis

Though previously considered a disease confined to mainland Europe, babesiosis has now been confirmed in UK dogs, particularly in Essex. Caused by the parasite Babesia canis and transmitted by Dermacentor reticulatus, babesiosis attacks red blood cells and can cause severe anaemia, dark or reddish urine, fever, lethargy, and collapse. This disease can be fatal if not treated promptly. Dog owners in south-east England and those travelling to mainland Europe with their pets should be especially aware of this risk.

Anaplasmosis

Caused by Anaplasma phagocytophilum and transmitted by Ixodes ricinus, anaplasmosis can cause fever, joint pain, shifting lameness, lethargy, and reduced appetite. Blood work often reveals low platelet counts. While less commonly diagnosed in UK dogs than Lyme disease, it remains a possibility in tick-endemic areas.

Ehrlichiosis

Canine ehrlichiosis, caused by Ehrlichia canis and typically transmitted by Rhipicephalus sanguineus (the brown dog tick), is not considered endemic in the UK. However, the BSAVA has noted cases in dogs that have travelled to or been imported from southern Europe, the Middle East, or other regions where the brown dog tick is established. Owners of rescue dogs imported from abroad should discuss screening with their veterinary surgeon.

Prevention Methods: What Works in the UK

The BVA, BSAVA, and BVZS issued a joint policy position (updated in 2025) advocating a risk-based approach to parasiticide use. This means that blanket, routine treatment of all dogs is no longer considered best practice. Instead, prevention plans should account for each dog's lifestyle, local tick exposure, health status, and the environmental impact of parasiticide chemicals, some of which have been detected in UK waterways.

Oral Chewable Preventives

Products containing isoxazoline compounds (such as fluralaner, afoxolaner, sarolaner, or lotilaner) are prescription-only medicines (POM-V) in the UK, meaning they must be prescribed by a veterinary surgeon following a clinical assessment. These are given monthly or, in some formulations, every 12 weeks.

• Advantages: Convenient dosing, no coat residue, unaffected by bathing or swimming, palatable for most dogs.
• Considerations: These products kill ticks after attachment rather than repelling them. The Veterinary Medicines Directorate (VMD) advises caution in dogs with a history of seizures.
• Suited to: Dogs that swim regularly, households with young children, dogs that accept oral medication easily.

Topical (Spot-On) Treatments

Some spot-on products are available without prescription in the UK, while others (particularly those containing newer active ingredients) remain POM-V. Common active ingredients include fipronil, permethrin, and imidacloprid.

• Advantages: Certain formulations offer repellent action, meaning they can deter ticks before they bite. Well-established safety profiles.
• Considerations: Can be reduced in effectiveness by frequent bathing or swimming. Permethrin-containing products are highly toxic to cats, which is critical in multi-pet households. The BVA/BSAVA guidelines also recommend avoiding topical products for dogs that regularly swim, due to environmental contamination concerns.
• Suited to: Dogs that are difficult to medicate orally, situations where repellent action is preferred.

Tick Collars

Sustained-release tick collars using active ingredients such as imidacloprid combined with flumethrin can provide protection for up to eight months.

• Advantages: Long-lasting, often repel and kill ticks, low maintenance.
• Considerations: Must fit correctly, may cause localised skin irritation, and could pose a risk if another pet chews the collar.
• Suited to: Owners preferring a set-and-forget approach, dogs in high-exposure areas.

Some veterinary professionals recommend combining methods in high-risk situations (for example, an oral preventive plus a repellent collar). Always consult a veterinary surgeon before combining products.

Vaccination Against Lyme Disease

A Lyme disease vaccine for dogs is available in the UK, though it is not part of the standard core vaccination schedule. It is typically recommended for dogs at high risk due to their location or lifestyle, for example those regularly walked in known tick hotspots such as the New Forest, Scottish Highlands, or Exmoor. The protocol involves an initial course of two injections given two to four weeks apart, followed by annual boosters. Discuss suitability with your veterinary surgeon.

No vaccines are currently available in the UK for canine babesiosis, ehrlichiosis, or anaplasmosis, making chemical prevention and tick avoidance the primary defences.

Daily and Weekly Habits That Reduce Risk

Daily Tick Checks

After every walk, particularly in grassland, woodland, or heathland, perform a thorough tick check. Focus on:

• Inside and around the ears
• Around the eyes and muzzle
• Under the collar and harness lines
• Between the toes and around the paw pads
• The groin, armpit, and belly areas
• Under the tail

Run your fingers slowly through the coat, feeling for small bumps. If a tick is found, use a tick removal tool (widely available from UK pet shops and veterinary practices, typically costing £2 to £5) to twist and lift the tick out. Avoid pulling straight up, squeezing the body, or using substances like petroleum jelly. For tips on safe warm-weather walking, see Teach Your Puppy Calm Lead Walking in Hot Weather.

Weekly Environmental Management

• Keep garden grass trimmed short, especially in areas where your dog plays
• Clear leaf litter and overgrown borders
• Be aware that hedgehog-friendly gardens (increasingly encouraged across the UK) can also harbour Ixodes hexagonus; balance wildlife conservation with tick awareness
• Wash dog bedding regularly on a hot cycle

Monthly Prevention Calendar: May Through July

May: Preparation and Launch

• Confirm your tick preventive supply covers the full season with no gaps.
• Book a veterinary wellness check, including tick-borne disease screening if your dog is in a high-risk area.
• Discuss the Lyme disease vaccine with your vet if your dog regularly walks in hotspot regions.
• Perform a garden tidy: mow lawns, clear brush, and reduce undergrowth.
• Begin daily tick checks after every outdoor outing.

June: Peak Vigilance

• Administer monthly preventive on schedule (set a phone reminder).
• Continue daily tick checks, especially after walks through long grass, bracken, or woodland.
• Inspect and wash dog bedding weekly.
• Monitor for early symptoms: unexplained lameness, fever, lethargy, or appetite changes.
• If travelling within the UK (particularly to Scotland, the Lake District, or the South West), research local tick activity.

July: Sustained Protection

• Administer the next dose of preventive on time.
• If using a tick collar, check fit and condition.
• Continue garden management.
• Book a mid-summer vet check if any symptoms have appeared or if your dog is frequently in high-risk environments.
• Keep dogs well hydrated and avoid peak-heat walks (typically midday to mid-afternoon), which also coincides with slightly reduced tick questing activity.

Remember that tick season in the UK extends well beyond July. Ixodes ricinus can remain active through autumn, and mild winters are allowing ticks to quest for longer periods each year. Year-round awareness is increasingly advisable.

Warning Signs That Require Veterinary Attention

Contact your veterinary practice promptly if your dog shows any of the following, particularly during or after tick season:

• Unexplained lameness or reluctance to move, especially if it shifts between legs
• Fever (normal canine temperature is approximately 38.3°C to 39.2°C)
• Swollen or painful joints
• Unexplained nosebleeds, bruising, or pale gums
• Sudden appetite loss lasting more than 24 hours
• Dark or reddish urine (possible sign of babesiosis or kidney involvement)
• Collapse or sudden severe lethargy

Early diagnosis and treatment with appropriate antibiotics (doxycycline is commonly used for Lyme disease and anaplasmosis) generally leads to a good prognosis. Babesiosis requires specific antiprotozoal treatment. Delayed treatment significantly worsens outcomes.

A Note on UK Regulations and Responsible Ownership

Under the Animal Welfare Act 2006, dog owners in England and Wales have a legal duty of care to protect their animals from pain, suffering, injury, and disease. Proactive parasite prevention is part of meeting this obligation. Microchipping is mandatory for all dogs in the UK, ensuring that if a dog becomes unwell while away from home, it can be identified and reunited with its owner. Owners of breeds affected by the XL Bully restrictions (in force since 2024) should be aware that all dogs, regardless of breed, benefit from the same tick prevention principles outlined here.

Considering adding another dog to your household this season? Plan parasite prevention for any new arrival from day one. See Should You Adopt a Second Dog in Summer? for guidance.

Final Thoughts

Tick-borne diseases are serious but highly preventable. The combination of a tailored chemical prevention plan (guided by the BVA/BSAVA risk-based approach), daily physical tick checks, environmental management, and appropriate vaccination where indicated provides a strong, layered defence. No single method is completely reliable on its own, but together these strategies dramatically reduce the risk. Work closely with your veterinary surgeon to build a plan suited to your dog's region, lifestyle, and health profile, and maintain it not just from May to July, but throughout the year.