Nine autumn hazards for dogs (and how to avoid them)

Learn how to keep your dog happy and healthy this autumn with our guide to dodging seasonal canine illness, pesky parasites, and more seasonal dangers.

Photo of a dog with spooky Halloween pumpkins for an article on common hazards dogs face in autumn

Overview

Autumn can be a wonderful time to share with your dog, with woodland walks, crunchy leaves, and cosy evenings. But while making memories, you should be aware of some hidden risks. With mould, mushrooms, frightening fireworks, and more, knowing what to look out for helps you keep your dog safe while enjoying the very best of autumn together.

1. Acorns and conkers

2. Wild mushrooms

3. Harvest mites

4. Seasonal canine illness (SCI)

5. Fireworks and Bonfire Night

6. Lungworm from slugs and snails

7. Halloween hazards

8. Dark evenings and road traffic

9. Fallen leaves and mould

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Medically reviewed by Lizzie Youens, BSc(Hons) BVSc MRCVS

Published on 09/09/2025 • Reviewed on 09/09/2025