Are sycamore tussock caterpillars poisonous to pets and symptoms?

Yes, sycamore tussock caterpillars can be harmful to pets, particularly dogs and cats. They have bristly hairs that can cause skin irritation, allergic reactions, or gastrointestinal distress if ingested. Symptoms may include vomiting, diarrhea, excessive drooling, and signs of discomfort or irritation. If a pet has been in contact with these caterpillars, it's advisable to consult a veterinarian.