Homemade tick repellent for dogs: what works and what's dangerous

Key points

• Tea tree oil is toxic to dogs, even when applied to the skin.
• No homemade repellent protects like a veterinary tick preventive (collar, spot-on or chewable).
• Checking your dog after every walk through grass or woods and removing ticks early lowers the risk of infection.
• To remove a tick: fine-tipped tweezers right against the skin and pull straight up, without twisting or squeezing, and no oil or alcohol.
• Leishmaniasis isn't spread by ticks but by sand flies, tiny mosquito-like insects.

If you're looking for a homemade tick repellent for dogs, we owe you a correction. For years this page suggested a mix of tea tree oil, citronella, lavender and vinegar. We've taken it down: tea tree oil is toxic to dogs, and no essential oil has been shown to protect against ticks.

What does work is combining a veterinary tick preventive with a very simple routine at home: checking your dog after every walk in the countryside or park and knowing how to remove a tick without breaking it. Here you'll find both, the diseases ticks carry, and when to see the vet.

Why we don't recommend essential oils or vinegar

Tea tree oil (melaleuca) contains terpenes that dogs absorb through the skin and by licking. Poisoning has been reported in small dogs from just a few drops of the undiluted oil: drooling, weakness, loss of coordination, tremors and a drop in body temperature. For cats in the household, which rub against the dog, it's even more dangerous.

Other essential oils (citronella, lavender, eucalyptus, peppermint) can irritate a dog's skin and sense of smell, which is far more sensitive than ours. And most importantly: there are no studies showing they keep ticks away during a walk, because they evaporate within minutes. Vinegar hasn't been shown to do anything either, and it stings on any cut or scrape.

The problem with an ineffective remedy isn't just that it doesn't work: it gives a false sense of security, and people stop using what actually protects.

What does protect: a veterinary tick preventive

Your vet will help you choose based on where you live, your dog's lifestyle and whether there are cats or children at home:

• Repellent collars: they last for months, and some also protect against sand flies.
• Spot-on treatments: every 3-4 weeks. Some are toxic to cats, so mention it if you live with one.
• Chewable tablets: they don't repel, but they kill the tick within a few hours of the bite and don't wash off in the bath.

No product is perfect, which is why the at-home check is still necessary.

The after-walk tick check

Ticks take hours to attach firmly and transmit disease, so finding them early makes a real difference. After every walk through fields, parks with long grass or woodland, take two minutes to run your hands over their whole body, against the direction of the coat, feeling for small bumps. Pay special attention to:

• Inside and behind the ears.
• The neck, especially under the collar.
• Armpits and groin.
• Between the toes and paw pads.
• Around the eyes and muzzle.
• The base of the tail and the area around the anus.

For long-haired dogs, a fine-toothed comb helps. Use the opportunity to clean and dry well between the toes, as we explain in the homemade dog deodorant. And check your own clothes too: the brown dog tick can set up home indoors.

Diseases ticks transmit to dogs

• Lyme disease: spread by deer ticks (black-legged ticks). Many infected dogs show no signs; others develop fever, shifting lameness and swollen joints. Most common in the US Northeast and upper Midwest.
• Ehrlichiosis: spread mainly by the brown dog tick. Fever, lethargy, nosebleeds, weight loss. It can become chronic.
• Anaplasmosis: fever, lameness, lethargy.
• Babesiosis: destroys red blood cells. Fever, pale gums, dark urine. It can become serious within days.
• Rocky Mountain spotted fever: found across much of the Americas. Fever, joint pain, sometimes small bleeds on the gums.
• Hepatozoonosis: caught by swallowing an infected tick, not from its bite.

Watch out for a widespread mix-up: leishmaniasis isn't spread by ticks but by sand flies, tiny mosquito-like insects that bite at dusk and at night. It's mainly a risk in Mediterranean countries (Spain, southern France, Italy, Greece) from May to October; if you travel there with your dog, ask your vet about specific repellents and vaccination.

When to see the vet

• If you can't remove the tick, or the head has stayed in and the area becomes swollen or starts oozing.
• If in the 2-3 weeks after a bite you notice fever, lethargy, loss of appetite, lameness, nosebleeds, pale gums or dark urine.
• If you find a lot of ticks at once, or ticks in the house.

For their skin after the outdoor season, try the soothing oatmeal bath. More ideas in homemade dog care.

What you need

• Fine-tipped tweezers or a tick removal hook
• Disposable gloves
• Skin antiseptic (diluted chlorhexidine or povidone-iodine)
• A small jar with a lid
• Fine-toothed comb for long-haired dogs

Step by step

1. Get your dog ready

   Find a well-lit spot and ask for help if your dog wriggles a lot. Put on gloves and part the fur until you can clearly see where the tick is attached.

2. Grip it close to the skin

   Grab the tick with the tweezers as close to the skin as possible, by the head, not by the swollen body. If you squeeze the body, you can push its contents into your dog.

3. Pull straight up, no twisting

   Pull upward with gentle, steady pressure, without twisting or jerking, until it lets go. If you're using a tick removal hook, follow that hook's instructions.

4. Don't use oil, alcohol or heat

   No oil, petroleum jelly, alcohol, hairspray or lighter on the tick to make it let go: it stresses the tick, which can regurgitate and raise the risk of infection.

5. Disinfect and keep it

   Clean the area with antiseptic and wash your hands. Put the tick in a closed jar and note the date, in case your dog gets sick and the vet wants to see it. Don't crush it with your fingers.

6. Watch the spot for a few days

   A small red bump for a few days is normal. If a bit of the mouthparts has stayed in, don't dig at it: the skin usually pushes it out on its own. If it gets swollen or starts oozing, see the vet.

Frequently asked questions

What is a natural tick repellent for dogs that works?

None has been shown to protect reliably. Essential oils evaporate within minutes, and some, like tea tree oil, are toxic to dogs. What works is a veterinary tick preventive (collar, spot-on or chewable) combined with an at-home check after every walk through grass or woods, which is fully in your hands.

Is tea tree oil bad for dogs?

Yes. Tea tree oil contains terpenes that are absorbed through the skin and by licking, and a few drops of undiluted oil can poison a small dog, causing drooling, weakness, tremors and loss of coordination. It's even more dangerous for cats. If you've applied it and notice any of these signs, wash it off with soap and water and call your vet.

What happens if the tick head stays in my dog?

Usually nothing serious. What tends to stay behind is the mouthparts, not the whole head, and the skin pushes them out on its own within a few days, like a splinter. Don't dig with needles or tweezers, because you'll irritate the area more. Disinfect and keep an eye on it: if it swells, hurts or oozes, have the vet look at it.

How long does a tick need to be attached to transmit disease?

It depends on the disease, but for most of them the tick needs to be attached for 24 to 48 hours. Some, like ehrlichiosis, can be transmitted sooner. That's why checking your dog on the same day as the walk and removing ticks as soon as possible greatly lowers the risk, although it doesn't remove it completely.