The processionary caterpillar can cause tongue necrosis, severe allergic reactions and even death. If you suspect contact, act fast.
The pine processionary (Thaumetopoea pityocampa) is one of the biggest spring vet emergencies in Spain.
The caterpillars are covered in thousands of microscopic hairs containing a toxin (thaumetopoein). Contact causes severe allergic reactions and inflammation.
Dogs sniff or lick them out of curiosity. Contact with the tongue causes massive swelling, tissue necrosis and may require partial tongue amputation.
In Madrid processionaries descend from pines between February and April when temperatures rise. This is when we see the most cases.
The Community of Madrid has millions of pine trees. Parks like El Retiro, Casa de Campo and urban parks in Chamberí are risk areas.
Do NOT rub the affected area. The hairs break and release more toxin. Don't let them lick.
Wash the area with plenty of water (not high pressure). If it's the mouth, try rinsing sideways.
Take them to the vet as soon as possible. This is a real emergency — every minute counts.
The vet will administer anti-inflammatories, antihistamines and painkillers. Severe cases may need hospitalisation.
"My dog licked a processionary in Parque del Oeste and his tongue started swelling. I rushed to Interzoo Viriato and they treated him immediately. They saved him from severe necrosis. Eternally grateful."
The most common symptoms are: sudden excessive drooling, swollen tongue or lips, vomiting, pawing at the mouth, and in severe cases, difficulty breathing. If you see any of these near pine trees, assume processionary contact.
Yes, if not treated quickly. The toxin causes tissue necrosis that can destroy part of the tongue or cause anaphylactic shock. With fast vet treatment, most dogs recover well.
Yes, though less common as cats are more cautious. If your cat has outdoor access near pine trees, watch for the same symptoms.
The main season is February to April, when caterpillars descend from pines to the ground. In mild winters they can start descending from January.
Avoid walking near pine trees during the season, especially if you see white silk nests in branches or lines of caterpillars on the ground. Keep your dog on a lead in risk areas.
Yes. During our opening hours (Mon-Sat 9am-9pm) we treat processionary emergencies. Contact us on WhatsApp or call 664 551 642.
Don't wait. Call or WhatsApp us right now. With processionary, every minute counts.