Happy spring walks can turn dangerous — Spanish police urge pet owners to protect dogs from toxic pine caterpillars found in green spaces. Credit : Shutterstock, Radek Preisler
As the sun comes out and we all start heading to the park a little more often, there’s one not-so-cute spring visitor pet owners need to watch out for: pine processionary caterpillars.
They might look like harmless little fluffballs, slowly crawling across the path in a neat line. But don’t be fooled — they can be extremely dangerous, especially to dogs who love sniffing everything in sight. Spain’s Policía Nacional has issued a fresh warning about just how serious things can get if your pet gets too close.
These caterpillars show up every year, mostly in areas with pine trees (hence the name). And while they’re just doing their thing — coming down from trees to bury themselves and continue their life cycle — their bodies are covered in toxic hairs that can cause real damage.
The hidden dangers of pine processionary caterpillars
Here’s the scary part: those hairs contain a toxin that can cause serious inflammation — not just a rash, but swelling, burns, and even tissue death if your pet licks or sniffs one. We’re talking emergency vet visit kind of serious.
According to the police, if your dog comes into contact with one, don’t wait. Get them to a vet straight away. Time matters — these reactions can move quickly, especially in sensitive areas like the mouth, tongue, nose or eyes.
And no, it’s not just dogs. Cats, and even curious toddlers, are at risk too.
How to protect your pet from pine caterpillar risks
First thing’s first: avoid pine-heavy areas during spring if you can. If not, keep your dog on a short lead, and keep an eye on what they’re sniffing — especially near tree bases, dirt paths or fallen pine needles.
If the worst happens and there’s contact, call your vet immediately. While you wait, rinse the area gently with warm water — but don’t rub. Rubbing could make it worse by spreading the toxin or pushing it deeper into the skin or mucous membranes.
Many local councils do set up signs in affected areas or treat the trees ahead of the season, so it’s also worth checking with them if you’re unsure where it’s safe to walk.
Spring walks should be fun — not a mad dash to the vet. So if you’re heading out with your four-legged friend, just keep your eyes open. A little awareness goes a long way when it comes to these deceptively dangerous little critters.
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