Dog Autumn Safety 2026: Vet urges owners to look out for five seasonal hazards - including conkers 🐶

Autumn is a great time to get out and about with your pup. | Canva/Getty Images

Dog owners are being encouraged to stay vigilant as autumn settles in, bringing a wave of seasonal hazards that can pose risks to dogs.

With conkers and acorns dropping, leaf piles gathering, and daylight disappearing earlier each day, dogs may face more dangers on their usual walkies, particularly puppies, scavengers, and dogs with existing health conditions.

Keeping an eye out for common autumn risks and making small adjustments to keep dogs safe, comfortable and happy can be all-important and avoid unwanted vet visits as the weather turns.

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Dr Linda Simon, resident vet at Pooch and Mutt, explained: “Autumn is beautiful, but it’s also full of hidden hazards for dogs. Conkers and acorns can be toxic, leaf piles can harbour mould, and darker evenings make visibility a real issue. Many owners don’t realise how quickly dogs can get into trouble at this time of year.

“The good news is that with a few simple precautions, autumn can still be a brilliant season for dogs. Staying aware of what’s under their paws, and what they’re trying to put in their mouths, goes a long way.”

Here’s her advice.

What autumn hazards should dog owners watch out for?

Here’s what to be aware of when out on autumn walks.

Conkers

Toxic if chewed or swallowed and can cause vomiting, drooling and gut upset. Larger conkers may also cause blockages.

Acorns

Contain tannins that irritate the stomach and can be dangerous if eaten whole.

Mouldy leaf piles

Damp leaves can harbor mould spores that trigger coughing, sneezing or skin irritation, especially in dogs who love to dive nose‑first into piles.

Blue‑green algae

Autumn rain can disturb ponds and lakes, increasing algae risk. Murky or green‑tinged water should be avoided entirely.

Darker evenings

Reduced visibility increases road risk. Reflective gear is essential for early morning or evening walkies.

What are the typical signs that my dog is in discomfort on or after an autumn walk?

Dr Simon says dogs may show discomfort or irritation through:

• Excessive sniffing or pawing at leaf piles
• Vomiting or drooling after scavenging
• Hesitation or anxiety on darker walks
• Scratching or skin irritation after wet‑weather strolls
• Increased clinginess or pacing in unfamiliar low‑light conditions

Many of these behaviours are your dog saying: ‘Something doesn’t feel right.’ A little extra caution, and some reflective kit, can make autumn walkies much safer.

What are the top tips for staying safe this autumn?

Here are the simple steps to take to keep your dog safe.

Stick to well‑lit routes

Choose paths with streetlights or take walkies earlier in the day.

Keep scavengers on‑lead

Conkers and acorns are tempting for curious pups.

Avoid leaf piles

They may look fun, but mould can irritate skin and airways.

Wipe paws after walks

Removes mould, mud and irritants.

Carry treats for redirection

Helps steer dogs away from fallen nuts and tempting piles.

Use reflective gear

Collars, harnesses and leads help keep dogs visible.

Skip murky wate

If a pond looks cloudy or green, avoid it completely.

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