Alcohol: toxic to animals
Alcohol is toxic to dogs and cats: symptoms, sources and what to do in case of poisoning.
Short & honest
Alcohol is dangerous for dogs and cats — even small amounts can cause severe poisoning. Moderate evidence (B): based on toxicological studies and clinical guidelines.
Safety assessment: Toxic — do not use
Veterinary review not yet completed
This page is awaiting review by a registered veterinary surgeon. Until then, treat the text as education based on the sources listed — not as a verified veterinary judgement.
Why is alcohol toxic to animals?
Dogs and cats have little efficient alcohol dehydrogenase activity — the enzyme that breaks down ethanol. As a result, alcohol accumulates rapidly in the body and reaches the brain in higher concentrations than in humans [1][3].
Ethanol depresses the central nervous system via two mechanisms: it enhances the inhibitory effect of GABA receptors and blocks the excitatory NMDA receptors. This leads to a cascade of poisoning that can cause hypothermia, hypoglycaemia and metabolic acidosis [1][3].
Cats are more sensitive than dogs. No safe threshold has been established for cats. Dogs are also vulnerable: even relatively small amounts can cause severe symptoms [1][2].
Hidden sources of alcohol
Alcohol is not only found in bottles. Animals can be exposed via:
- Beer, wine and spirits (including alcohol used in cooking)
- Fermented fruit (fallen from the fruit bowl or from the ground)
- Hand sanitisers — contain 60–70% ethanol; a lick of the skin or the floor can already be dangerous
- Liquid medicines and mouthwashes that use alcohol as a solvent
- Raw bread dough — a specific risk: yeast ferments in the warm stomach and produces ethanol directly in the digestive tract [2]
Symptoms of alcohol poisoning
Symptoms usually begin within 30 to 60 minutes after ingestion [1]:
| Early | Severe |
|---|---|
| Ataxia (wobbly walking) | Hypothermia |
| Vomiting | Hypoglycaemia |
| Lethargy | Respiratory depression |
| Disorientation | Coma |
Small animals — especially cats and small dogs — are extra vulnerable to hypoglycaemia, which can be life-threatening [1][3].
What to do?
There is no specific antidote for alcohol poisoning in animals [1][3]. Treatment is supportive and must be carried out by a veterinary surgeon:
- Glucose infusion for hypoglycaemia
- Heat support for hypothermia
- Monitoring of respiration and heart function
- In some cases gastric lavage, depending on the time of ingestion
Do not wait. Contact the veterinary surgeon or the nearest emergency veterinary number immediately if you suspect your dog or cat has ingested alcohol — even if the amount seems small.
'Natural' yeast or fruit is also a risk
The assumption that fermented or 'natural' products are safer is incorrect. Fermented fruit, homemade alcoholic beverages and raw dough also contain ethanol and are equally dangerous [2].
Sources
[1] Ethanol Toxicosis: A Review — Today's Veterinary Practice (2017). https://todaysveterinarypractice.com/toxicology/practical-toxicologyethanol-toxicosis-review/
[2] Drunk and Disorderly: Ethanol and Yeast Dough Intoxications — ASPCA Pro. https://www.aspcapro.org/resource/drunk-and-disorderly-ethanol-and-yeast-dough-intoxications
[3] Toxicoses from Alcohols in Animals — Merck Veterinary Manual. https://www.merckvetmanual.com/toxicology/toxicoses-from-household-hazards/toxicoses-from-alcohols-in-animals
Why this verdict?
The evidence is based on toxicological case series, experimental animal studies and clinical guidelines from veterinary authorities [1][2][3]. Large-scale controlled trials are lacking, but the mechanism and symptomatology are biochemically well substantiated and widely documented in the veterinary literature. Evidence grade B: moderate evidence.
Legal status (Netherlands)
Not applicable.
Sources
- [1] Ethanol Toxicosis: A Review. Today's Veterinary Practice, 2017. Narrative review source ↗
- [2] Drunk and Disorderly: Ethanol and Yeast Dough Intoxications. ASPCA Pro (American Society for the Prevention of Cruelty to Animals). Guideline source ↗
- [3] Toxicoses from Alcohols in Animals. Merck Veterinary Manual. Monograph source ↗