You just got back from a walk in the Sihlwald or along the Zürichberg trails, and now you're wondering whether you should be checking your dog for ticks. You should — and not just in summer. In Switzerland, tick season runs from March to November, and Canton Zürich sits squarely in a risk zone.
Here is what you need to know: when ticks are active, what diseases they carry, how to protect your dog, and what to do if one latches on.
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Tick season in Switzerland runs from March through to November. Activity peaks twice: April–May and again September–October. During mild winters, ticks can be active outside these windows too.
Geographically: with the exception of the cantons of Geneva and Ticino, the whole of Switzerland is considered a tick risk area. Canton Zürich is entirely within this zone.
Climate change has compounded this. Due to milder winters, ticks in Switzerland are now found at elevations of up to 2,000 metres. If you walk your dog on the Uetliberg, through the Zürichberg forests, or into the pre-Alpine foothills, the risk is real year-round — not just in the height of summer.
According to Swiss surveillance data reported in the CDC Emerging Infectious Diseases Journal, tick-suitable habitat in Switzerland has expanded from roughly 16% of the country in 2009 to an estimated 25% or more. The range is growing.
Which Tick Species Are Found in Switzerland?
The most common tick in Central Europe is Ixodes ricinus — the castor bean tick. Other medically relevant species present in Switzerland include:
| Species | Common Name | Habitat |
|---|---|---|
| Ixodes ricinus | Castor bean tick | Across Switzerland, very common |
| Dermacentor reticulatus | Ornate dog tick / meadow tick | Forests, meadows |
| Rhipicephalus sanguineus | Brown dog tick | Warmer, Mediterranean-influenced areas |
| Hyalomma marginatum | Mediterranean Hyalomma | Introduced, increasing |
Ixodes ricinus has a three-stage life cycle: larva → nymph → adult. Each stage requires a blood meal from a vertebrate host. Dogs are suitable hosts at every stage, which means a dog walking through long grass is exposed regardless of the tick's age.
What Diseases Can Ticks Transmit to Dogs?
Two diseases are of primary concern in Switzerland:
Lyme disease (Borreliosis) — a bacterial infection transmitted through the bite of an infected tick. In dogs, symptoms can include lameness, swollen joints, fever, and loss of appetite. It is treatable when caught early.
Tick-borne encephalitis (TBE) — a viral infection affecting the nervous system. TBE cases in humans in Switzerland have risen significantly, from 112 cases in 2014 to 436 in 2024, according to Swiss surveillance data reported in the CDC Emerging Infectious Diseases Journal. The clinical relevance of TBE for dogs is less well established — your vet is the right person to advise you on this for your individual dog.
Ticks can also transmit other bacteria and parasites. Early and consistent prevention is the most effective response.
How to Protect Your Dog Against Ticks
Several product categories are available that either repel ticks or kill them before they can transmit disease. The right choice depends on your dog's weight, age, health status, and lifestyle. Always consult your vet before starting a tick prevention regime — there is no one-size-fits-all answer.
Spot-on treatments are applied to the back of the neck and work for several weeks. They kill ticks before they can complete a blood meal and transmit pathogens.
Tick collars provide long-lasting protection (often several months) by releasing active ingredients continuously. Suitable for dogs who spend a lot of time in risk areas.
Sprays offer targeted, short-term protection — useful before a specific walk in high-risk terrain. They need to be reapplied regularly.
Oral treatments (tablets or chews) work systemically and kill ticks when they begin feeding.
What to do after every walk:
- Check your dog thoroughly — pay particular attention to the head, ears, armpits, groin, and between the toes.
- Remove any tick as quickly as possible. The shorter the feeding time, the lower the transmission risk.
- For removal from a dog, ask your vet for guidance or follow the instructions provided with a tick removal tool. Human removal protocols do not directly translate to dogs.
- Note when and where you found the tick, and monitor your dog over the following weeks.
Where Is the Risk Highest in Canton Zürich?
Anywhere with grass, shrubs, or woodland edges. In practical terms for Zürich dog owners:
- Zürichberg — dense forested trails with high tick populations
- Uetliberg and Albis ridge — hiking paths through meadows and woodland margins
- Sihlwald — a natural floodplain forest: damp, shaded, ideal tick habitat
- Around Greifensee and Pfäffikersee — lakeside reeds and grassland
- Weinland and Unterland — open agricultural land with field edges
In short: almost any dog-friendly area in Canton Zürich has tick-suitable terrain. That is not a reason to avoid these places — it is a reason to always include a tick check in your post-walk routine.
The Züri Paw Society DogMap lists dog-friendly parks, off-leash areas, and green spaces across the canton. Browse by area to plan your walks — and factor in the tick check when you return.
Tick Protection as Part of Your Basic Setup
Tick prevention is not something you do once in spring and forget about. It is an ongoing measure across the entire season, and it should be part of your standard routine as a dog owner.
If you have recently got a dog in Zürich, the first-time dog owner checklist walks you through everything you need to sort in the first weeks and months — from registering your dog to setting up veterinary care. Tick prevention belongs on that list from day one.
One small but essential item to keep on hand: a proper tick remover tool. It is the only reliable way to lift a tick out without squeezing the body or leaving the head embedded in the skin. Fingers and household tweezers tend to do the opposite, which is exactly what raises the transmission risk.
If you are building a picture of what dog ownership costs in Switzerland, tick prevention products and regular vet visits are a real line item. The article on the total cost of owning a dog in Zürich gives you realistic figures across all the main categories.
Summary: Simple, But Consistent
Ticks are common throughout Switzerland, the season is long, and Canton Zürich is fully within the risk zone. That sounds alarming — but the practical response is straightforward:
- Choose an appropriate prevention product (discuss with your vet)
- Check your dog thoroughly after every walk
- Know the symptoms and act quickly if they appear
That is what protection against ticks for dogs actually looks like in practice: not complicated, but done every time.
