What autumn things are dangerous to dogs and cats?
Vets see the same cluster of problems every autumn. What is actually dangerous, what is merely messy, and which ones need a phone call rather than a wait-and-see.
- Difficulty
- beginner
- Time
- 15 min
- Read
- 6 min
- Safety
- warning
Short answer
The genuine emergency is antifreeze, which is sweet, attractive to cats and dogs, and causes kidney failure — ring a vet immediately on suspicion rather than waiting for symptoms. Conkers and acorns are toxic and also a blockage risk; wild mushrooms are unidentifiable in the field and should be treated as dangerous; and fallen fruit ferments. The rest of autumn is mostly about darkness, mud and parasites.
Autumn is a distinct season for pets rather than just a colder version of summer, and the reasons cluster neatly. Things fall off trees that were not there before. People start using antifreeze and screenwash. Heating goes on, which wakes up dormant flea eggs in carpets. Walks move into darkness. And fireworks arrive. Almost every autumn call a vet takes traces back to one of those five changes, which makes the season unusually easy to prepare for once you know the list.
Safety
Step by step
- Treat antifreeze as the emergency it is.Ethylene glycol is sweet-tasting, and animals will drink it from a puddle or a spill on a driveway. It causes severe kidney damage and is frequently fatal, and treatment works far better before symptoms appear. Ring a vet immediately on suspicion — do not wait to see whether the animal seems unwell. Store containers sealed and out of reach, and clear any spill immediately rather than hosing it into a gutter.
- Keep conkers and acorns out of reach.Both are toxic to dogs and cats — conkers contain aesculin — and both are the right size and shape to cause an intestinal blockage, which can be the more immediate danger. Dogs that carry and chew things are most at risk. If one has been swallowed, ring the vet rather than waiting.
- Assume every wild mushroom is dangerous.Some are harmless and some are lethal, and telling them apart from a photograph on a phone is not realistic. Autumn is peak fungus season on lawns, in woods and under trees. Discourage interest, and if a dog eats one, photograph the mushroom and ring the vet with it.
- Clear fallen fruit.Windfall apples, plums and pears ferment as they rot, and a dog that eats a quantity can get alcohol poisoning as well as an upset stomach. Stones and cores are also a blockage and obstruction risk. It is one of the easiest hazards to remove entirely.
- Expect fleas when the heating goes on.Flea eggs and pupae lie dormant in carpets and soft furnishings and hatch when warmth and vibration tell them a host is nearby, which is precisely what central heating does. An autumn flea surge in a house that seemed clear all summer is normal, and the catalogue covers getting rid of fleas in the house properly — treating the animal alone never works.
- Keep parasite treatment going into autumn.Ticks remain active well into autumn in mild weather, and harvest mites peak in late summer and early autumn, typically causing intense irritation around the feet and ears. This is a conversation for your vet rather than a shop shelf, because the right product depends on the animal and the area.
- Make dark walks visible.The clocks going back moves the evening walk into darkness overnight. A light-up or reflective collar for the dog and something reflective on you is a small purchase that genuinely reduces risk on rural roads and unlit paths. The catalogue's guide on checking outdoor lighting and paths before the dark months covers the home end.
- Prepare for fireworks well before the night.The effective preparations — a safe hiding place, sound habituation, pheromone diffusers, and a conversation with your vet if the animal has been badly affected before — all need weeks rather than hours. The catalogue's guide on keeping a pet calm during fireworks covers it, and starting in early October rather than early November is the whole point.
- Deal with mud and grit sensibly.Rinse paws after muddy walks and once road gritting starts, since salt and grit irritate pads and are licked off. Check between the toes for grass seeds, mud balls and cuts while you are doing it.
Common mistakes
- Waiting to see whether a pet becomes unwell after a suspected poisoning — For antifreeze in particular, the window in which treatment works well is short and closes before obvious symptoms appear. The call costs nothing and the delay can cost the animal.
- Trying to make an animal vomit at home — Home methods are unreliable and some cause additional damage, particularly with anything caustic. It is a decision for a vet, who can do it safely and will not do it at all where it would make things worse.
If it doesn't work
Pet is unsteady, appears drunk, or is drinking and urinating much more than usual
Cause: Possible antifreeze poisoning — Fix: This is an emergency. Ring the vet or the out-of-hours service now and say you suspect antifreeze. Do not wait, and do not try to treat it at home.
Dog has swallowed a conker or an acorn
Cause: Toxicity and obstruction risk — Fix: Ring the vet. They will judge by size, breed and how long ago. Do not attempt to make the animal vomit.
Sudden scratching in a house that seemed flea-free
Cause: Heating triggering dormant pupae — Fix: Treat the animal and the environment together — the catalogue's guide covers it. Treating only the pet leaves the far larger population in the carpet.
Bright orange dust between the toes and intense itching
Cause: Harvest mites, which peak in late summer and autumn — Fix: Speak to your vet. It is very uncomfortable for the animal and the usual flea products do not necessarily cover it.
Cat missing or hiding around bonfire night
Cause: Fireworks — Fix: Keep cats in and litter trays available from late afternoon on nights fireworks are likely, and make sure the microchip details are current — the days after firework nights are when strays are handed in.
Dog stiff or reluctant after cold wet walks
Cause: Cold aggravating existing joint problems — Fix: Common in older dogs as the weather turns. Worth mentioning to the vet rather than assuming it is just age, since it is often treatable.
Questions people ask
Are all mushrooms in the garden dangerous?
Many are harmless, and a few are extremely dangerous, and there is no reliable way to tell in the field. Since the consequences are so uneven, the practical rule is to treat any mushroom a pet has eaten as a reason to ring the vet, and to photograph it before it is destroyed.
Is antifreeze still a common problem?
Yes. Some products now include a bittering agent, but not all do, and spills from car maintenance, garden water features and screenwash remain a regular cause of poisoning. Cats are particularly at risk because they walk through spills and then groom their paws.
When should fireworks preparation start?
Several weeks ahead. Pheromone diffusers take time to build up, sound habituation is a gradual process, and if your vet is going to prescribe anything for an animal with a history of severe distress, that appointment needs to happen before the first fireworks rather than after.