Updated 2026-08-07 · Source: ASPCA Animal Poison Control — People Foods to Avoid Feeding Your Pets; VCA Animal Hospitals — pet health library · Free · No sign-up
No — marshmallows should not be given to cats. If yours has already eaten some, call your vet.
If your cat may have eaten something harmful — or any part of a lily — call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435 right now — don't wait for symptoms. A consultation fee may apply to the ASPCA hotline.
Verdict for cats
Don't feed
Severity
3 / 5 — Risky — more than a taste can cause real illness.
Safe amount
None
Category
Sweets
Source
ASPCA Animal Poison Control — People Foods to Avoid Feeding Your Pets; VCA Animal Hospitals — pet health library · reviewed 2026-08-07 · confidence: medium
Why
Choking and sticky-texture risk, no nutritional value, and the sugar-free versions carry xylitol. Skip them.
Signs to watch for if your cat has eaten marshmallows
Gagging, retching or pawing at the mouth
Difficulty breathing or swallowing
Repeated vomiting, especially bringing up food or water
No appetite, a painful belly, straining to pass stool, or no stool at all
Signs can lag by a day or more, so no symptoms does not mean your cat is clear — call rather than watch.
What to do now
Don't feed it. If your cat has already eaten some, call your vet or poison control with the amount and the timing and follow their advice.
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.
Safer alternatives for cats
A small piece of plain cooked chicken or turkey
Plain cooked fish, boneless and unseasoned
A vet-approved commercial cat treat, kept to under a tenth of daily calories
Cat grass grown indoors instead of houseplants
Fresh water — a fountain tempts many cats to drink more
This page is a reference, not veterinary advice or a diagnosis. Verdicts are transcribed from the cited source, never inferred, and a finding in one species is never copied onto the other. How we source and decide a verdict.
No — marshmallows should not be given to cats. If yours has already eaten some, call your vet. Choking and sticky-texture risk, no nutritional value, and the sugar-free versions carry xylitol. Skip them.
What happens if a cat eats marshmallows?
Watch for: Gagging, retching or pawing at the mouth; Difficulty breathing or swallowing; Repeated vomiting, especially bringing up food or water; No appetite, a painful belly, straining to pass stool, or no stool at all. Some signs lag by a day — call, don't wait.
How many marshmallows are dangerous for a cat?
More than a taste can cause real illness, and the risk rises with the amount and with a smaller pet. The safe amount is none — if your cat has had more, call your vet.