The short answer
Don’t panic. Cats rarely develop clinical Lyme disease. Remove the tick gently with a Tick Twister or fine-tipped tweezers, save it in a sealed bag for eTick.ca, and watch your cat for two weeks. The bigger flag here is that ticks are entering your home — time to re-evaluate prevention.
Step-by-step: what to do right now
1. Remove the tick — gently
Cats are not patient patients. Tweezers can hurt or scare them, which makes the second tick removal much harder than the first. Use a Tick Twister (O’Tom) if you have one — it slides under the tick body and lifts with a simple rotation. A wide-jaw tick removal tool like TickEase also works.
If you only have fine-tipped pointed tweezers:
- Pair removal with a treat or distraction. Two people are easier than one.
- Grasp the tick as close to the skin as possible. Pull straight up with steady, even pressure (or rotate gently with a Tick Twister).
- Don’t squeeze the tick’s body, and don’t apply alcohol, petroleum jelly, or a lit match to the tick — these all increase the chance the tick regurgitates infected saliva.
- Disinfect the bite site afterward.
If your cat won’t tolerate it, call us. We’d rather have you bring the cat in than have the tick stay on for another day or pieces of mouthparts get crushed into the skin.
2. Save the tick
Drop it into a small sealed plastic bag or pill bottle. Don’t crush it, don’t flush it, don’t burn it. A saved tick can be identified by species, which is useful information — particularly if it turns out to be a lone star tick or American dog tick (the cytauxzoonosis vectors). Keep it for at least 5 days in case eTick.ca asks for additional photos.
3. Submit to eTick.ca
eTick.ca is the free Canadian tick identification platform. Upload up to three photos. An expert returns a species ID in 1–2 business days. Cat ticks count for surveillance — Halton Region Public Health and Public Health Ontario reference eTick data in their tick risk maps.
For more on the platform, see our eTick guide.
4. Watch your cat for two weeks
Cats are remarkably resistant to clinical Lyme disease — Cornell Feline Health Center reports no naturally acquired clinical case has been documented outside the lab in North America. So Lyme is unlikely. The things to actually watch for are:
- Lethargy or hiding behaviour out of character
- Fever (warm ears, dull coat, refusing to eat)
- Decreased appetite
- Pale gums or jaundice (yellow tinge to gums or eye whites)
- Voice change, weakness in the back legs, or breathing difficulty (possible tick paralysis from engorged Dermacentor females)
Call us for any of those signs. The pale gums / jaundice combination is particularly important if eTick identifies the tick as a lone star or American dog tick — those are the cytauxzoonosis vectors, and that disease is fast-moving.
5. Don’t apply dog tick products to your cat
This is the most common preventable cat emergency in multi-pet homes. Permethrin — the active ingredient in K9 Advantix II, many spot-ons, and some flea collars — is severely toxic to cats. A “small dose” of a dog product applied to a cat can cause tremors, seizures, hyperthermia, and death within hours.
If anyone has applied a dog product to your cat, or your cat has been in close contact with a dog treated in the past 48–72 hours, call us immediately. Signs of permethrin exposure include drooling, ear or facial twitching, muscle tremors, seizures, hyperthermia, ataxia, and dilated pupils. Don’t wait for symptoms to worsen.
6. Re-evaluate the household setup
A tick on the cat means ticks are getting into your home. Worth checking:
- Is the dog on a current preventive? If not, that’s the next call.
- Has anyone been doing yard work or hiking? Carrying ticks in on clothes is real.
- Are there gaps under doors or window screens?
- Does the yard back onto a wooded area, ravine, or unmowed greenspace?
For the bigger picture and the local Halton context, see our 2026 field guide on ticks in Oakville and Halton.
What about a 4DX or other blood test?
We don’t routinely 4DX cats. The 4DX is designed for dogs and has no validated feline equivalent. If a tick-borne illness is suspected based on symptoms, send-out PCR or serology is what we’d run — and only if there’s a clinical reason.
Should my cat be on tick prevention going forward?
Outdoor and indoor-outdoor cats: usually yes. Strictly indoor cats with a dog in the house bringing ticks in: also worth a conversation. Cat-safe options include NexGard Combo, Revolution Plus, Bravecto Plus, and Credelio Cat. We’ll match the product to your cat’s lifestyle.
For why this matters, see our post on tick exposure in cats — short answer: yes, even indoor ones.
Key takeaways
- Remove the tick gently — Tick Twisters are usually less stressful for cats than tweezers.
- Save the tick in a sealed bag and submit to eTick.ca for species ID.
- Watch for lethargy, fever, decreased appetite, pale gums, or jaundice for two weeks.
- Cats rarely get clinical Lyme — but cytauxzoonosis (a different tick-borne disease) is fatal in 40% of cases. Watch the gums.
- Never apply dog tick products to cats. Permethrin can kill them.
- A tick on the cat is a signal that ticks are entering the home — re-evaluate the dog’s prevention and the yard.
References
- Cornell Feline Health Center — feline Lyme disease.
- eTick.ca — etick.ca.
- Halton Region Public Health — tick-borne disease surveillance.