No — tea is bad for dogs. Tea contains caffeine and theobromine, both of which are toxic to dogs. A few licks of cold tea is unlikely to cause harm in a large dog, but tea should be treated as a no-go.

✓ Reviewed against PDSA, Blue Cross & Animal PoisonLine guidance · Last reviewed: 2026-07

Can dogs eat tea?

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The full picture

Tea is a more nuanced toxicity than most owners realise. The active compounds are caffeine and theobromine — the same two methylxanthines that make chocolate dangerous to dogs. Standard UK black tea contains around 50mg of caffeine per cup.

Is tea bad for dogs? Yes, but severity depends entirely on how much they drink relative to their body weight. Caffeine becomes toxic to dogs at around 9mg/kg body weight. A 10kg dog drinking a full cup of strong black tea reaches the mild-toxicity threshold.

Tea bags are a separate problem. A dog who finds a tea bag in the bin and eats it gets a concentrated dose — much higher than a brewed cup.

Caffeine-free herbal teas (chamomile, rooibos, peppermint) are lower-risk but herbal blends can contain other compounds that are problematic for dogs. The safest approach: don't give dogs tea of any kind.

If your dog ate more than a safe amount

Risks to watch for

Caffeine and theobromine toxicity
Teabags can cause blockage if swallowed
Herbal teas vary wildly
Milky tea adds lactose

Safe portion size

Not recommended. A tiny lick of cooled milky tea rarely causes harm.

Safer alternatives

Water
Plain bone broth (no onion/garlic)

While you're checking what your dog can safely eat, make sure their flea and worm protection is up to date too.

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Common questions

Is tea bad for dogs?

Yes. Tea contains caffeine and theobromine, both toxic to dogs. The severity depends on body weight and amount consumed.

Can dogs have tea?

No. There's no benefit and a real toxicity risk. Even 'weak' tea contains caffeine.

Can dogs drink tea with milk?

Same caffeine risk as plain tea, plus the lactose issue from the milk. Both reasons say no.

What if my dog ate a tea bag?

Call the vet. Tea bags carry concentrated caffeine and the bag itself can cause obstruction.

Are herbal teas safer?

Chamomile, rooibos, and peppermint are caffeine-free and broadly safe, but most blends contain ingredients of unknown safety. Default to no.

Can dogs have green tea?

Green tea has similar caffeine content to black tea. Same rules apply.

My dog licked some cold tea — will they be OK?

A few licks of cold tea for a large dog is very unlikely to cause harm. Watch for symptoms over the next 2–3 hours.

Important: This page is general information, not veterinary advice. Every dog is different, and individual factors (age, breed, health conditions, medications) can change what's safe. If in doubt, always contact your vet — or the Animal PoisonLine on 01202 509000 in the UK.