| Verdict for cats | Caution |
| Severity | 2 / 5 — Mild — usually stomach upset; watch them. |
| Safe amount | A taste at most |
| Category | Human snacks |
| Source | VCA Animal Hospitals — pet health library; Pet Poison Helpline · reviewed 2026-08-07 · confidence: medium |
Not a listed toxin for cats, but cats are less able to process the compounds in some spices and essential oils, and cinnamon oil in particular can be irritating. Skip it.
Don't make it a habit. Watch for vomiting, diarrhea or a lost appetite over the next day and call your vet if it doesn't settle or your cat seems unwell.
Never induce vomiting and never give any medicine unless a vet tells you to — it can do more damage than the poison. What we will and won't tell you.
If you're sharing food because you want to treat them, a treat formulated for cats does the job without the guesswork.
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Can dogs eat cinnamon? — Feed with caution to dogs.
Not toxic, but be careful — cinnamon isn't poisonous to cats, and it comes with caveats that matter. Not a listed toxin for cats, but cats are less able to process the compounds in some spices and essential oils, and cinnamon oil in particular can be irritating. Skip it.
Watch for: Vomiting; Diarrhea or loose stools; Loss of appetite; Belly discomfort or unusual tiredness. Some signs lag by a day — call, don't wait.
The safe amount is a taste at most, as an occasional treat rather than a daily habit. Large amounts mainly cause stomach upset; if that doesn't settle within a day, call your vet.