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Is Choy Sum 'Sumo' toxic to cats?

Brassica rapa var. parachinensis 'Sumo'

Mildly toxic to cats

Mildly. The ASPCA lists choy sum 'sumo' as mildly toxic to cats — a chewing cat typically gets mouth irritation, drooling, and vomiting rather than a medical emergency, but it is still best kept out of reach. This classification follows the ASPCA Toxic and Non-Toxic Plant List. ASPCA classifies cultivated Brassica/Indian Mustard greens as toxic to horses (isothiocyanates; gastrointestinal irritation and colic). The entry does not flag cats or dogs as toxic and small cooked portions are usually tolerated, but isothiocyanates can cause GI upset and large, repeated amounts risk thiocyanate effects—most notably in cats. Keep away from horses and consult a vet for any unwell pet.

What to do if your cat ate choy sum 'sumo'

  1. Remove any plant material from your cat's mouth and move choy sum 'sumo' out of reach.
  2. Note how much was eaten and when, and watch for drooling, vomiting, or lethargy.
  3. Do not induce vomiting unless a vet or poison-control specialist instructs you to.
  4. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 and follow their advice.
  5. Bring a leaf or photo of choy sum 'sumo' to the appointment so it can be treated correctly.

General guidance, not veterinary advice. If you think your cat has eaten choy sum 'sumo', contact your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 — do not wait for symptoms to worsen.

Is choy sum 'sumo' toxic to cats? — FAQ

Is choy sum 'sumo' toxic to cats?

Mildly. The ASPCA lists choy sum 'sumo' as mildly toxic to cats — a chewing cat typically gets mouth irritation, drooling, and vomiting rather than a medical emergency, but it is still best kept out of reach. ASPCA classifies cultivated Brassica/Indian Mustard greens as toxic to horses (isothiocyanates; gastrointestinal irritation and colic). The entry does not flag cats or dogs as toxic and small cooked portions are usually tolerated, but isothiocyanates can cause GI upset and large, repeated amounts risk thiocyanate effects—most notably in cats. Keep away from horses and consult a vet for any unwell pet.

What are the symptoms if a cat eats choy sum 'sumo'?

ASPCA classifies cultivated Brassica/Indian Mustard greens as toxic to horses (isothiocyanates; gastrointestinal irritation and colic). The entry does not flag cats or dogs as toxic and small cooked portions are usually tolerated, but isothiocyanates can cause GI upset and large, repeated amounts risk thiocyanate effects—most notably in cats. Keep away from horses and consult a vet for any unwell pet. Signs usually appear soon after chewing rather than hours later — watch for drooling, pawing at the mouth, vomiting, loss of appetite, or unusual lethargy after your cat has had access to choy sum 'sumo'.

What should I do if my cat ate choy sum 'sumo'?

Stay calm. Remove any plant from your cat's mouth and take the plant away. Note how much was eaten and when, and do not induce vomiting unless told to. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 and follow their advice; a leaf or photo helps the vet treat it correctly.

Is choy sum 'sumo' toxic to dogs too?

The ASPCA classification Growli uses applies to both cats and dogs: Choy Sum 'Sumo' is mildly toxic to dogs as well. See the full choy sum 'sumo' pet-safety guide for both species.

What is a cat-safe alternative to choy sum 'sumo'?

For a similar look without the risk, see the best cats-safe plants list — every plant there is ASPCA non-toxic to cats and dogs.

Full choy sum 'sumo' pet-safety