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What should I do if my dog swallowed part of a battery?
Last updated 23 September 2026 · How we write and check this
Short answer
Treat this as an emergency and call your vet or an emergency animal poison line immediately, without waiting for symptoms. Batteries can leak corrosive material that burns the digestive tract from the inside, and the danger increases the longer a leaking battery stays in contact with tissue.
Why this is always urgent
Unlike many swallowed objects where a wait and watch approach is sometimes reasonable, a battery poses an active chemical risk the moment it is swallowed, since a punctured or leaking casing can begin causing internal chemical burns immediately, regardless of size.
What to tell the vet
The type of battery, button, cylindrical, or a larger device battery, roughly how long ago it happened, and whether the casing looked intact or damaged all help your vet or the poison line assess how urgently to act.
What to watch for on the way
Drooling, pawing at the mouth, vomiting, or visible discomfort can appear quickly if a battery is leaking, but the absence of symptoms does not mean it is safe to wait, since internal damage can be underway before outward signs appear.
Key takeaways
- A swallowed battery is always an emergency, regardless of size or whether symptoms are present yet.
- Leaking battery material can cause chemical burns to the digestive tract quickly.
- Call your vet or an emergency poison line immediately rather than waiting to see what happens.