Sweet red bean paste (anko)
CautionThe problem with anko is sugar, not beans - commercial paste is close to half sugar by weight. Small amounts cause loose stool; the mochi wrapped around it can obstruct. If the label says sugar-free, check for xylitol first.
This food guide has not been reviewed by a veterinarian. It summarises general information from sources and should not be used to decide whether a food is suitable for an individual dog or to assess an emergency.
Check before feeding
Check the precautions before sharing
Risk depends on preparation, ingredients or amount. Read the precautions below; body weight alone cannot establish a safe portion.
Signs and health concerns
This list includes both observable signs and conditions identified through examination or testing. It cannot establish the cause or whether an exposure is safe.
- Vomiting
- Diarrhoea
- Loose stool
- Lethargy
- Abdominal pain
- Pancreatitis
- Low blood sugar
- Blocked oesophagus
- Weight gain
More about this food
Sweet red bean paste is boiled adzuki cooked down with roughly its own weight in sugar. Adzuki itself is not toxic to dogs, but in this form it is not a bean - it is a lump of sugar.
A small amount is not an acute poisoning. A dog that stole a bite of an anpan, a dorayaki or a mooncake usually gets loose stool or a round of vomiting within a few hours. Leave water down and watch for twelve hours. The problem scales with quantity: baked goods built around anko usually carry butter, cream or condensed milk too, and a high-fat, high-sugar load can trigger pancreatitis in dogs. Repeated as a habit, it buys obesity and dental disease.
Often what came with the paste matters more than the paste. Mochi and other glutinous rice wrappers are sticky enough to lodge in the esophagus or gut. Chocolate coatings add theobromine, which is toxic. Ice-cream desserts add dairy on top. When you count what your dog ate, do not count only the bean paste - keep the wrapper and read it.
If the product is labeled sugar-free, reduced-sugar or keto, check the ingredient list for xylitol, which in the US is sometimes labeled as birch sugar. The Merck Veterinary Manual puts hypoglycemia above roughly 100 mg/kg of xylitol and severe hepatic insufficiency above 500 mg/kg. Low blood sugar can appear within 30 minutes or be delayed 12 to 18 hours, and signs of liver injury may not show for 24 to 48 hours. If xylitol is on the label, call now even if your dog looks fine.
For ordinary sugar-sweetened paste with no chocolate and no mochi, observation is enough. If your dog vomits repeatedly, goes flat, guards the belly, or takes a praying position with the front end down and the rear up, treat it as possible pancreatitis and call your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435. Do not induce vomiting at home.
Frequently asked questions
- My dog ate a red bean bun. Should I worry?
- One bun is mostly sugar, flour and fat, so most dogs get loose stool or a bout of vomiting and nothing more. Offer water and watch for twelve hours. If it had a chocolate coating or a mochi wrapper, keep the package and call your vet.
- Is sugar-free red bean paste safer?
- It can be far more dangerous. Sugar-free products may use xylitol, which causes hypoglycemia above about 100 mg/kg and liver failure above 500 mg/kg. Check the ingredients for xylitol or birch sugar, and call your vet immediately if it is there.
- He swallowed a whole mochi with bean paste inside.
- The mochi is the bigger concern. Glutinous rice dough is sticky enough to lodge in the esophagus or intestine. Gagging, drooling, repeated vomiting or trouble swallowing means go now, not wait. Call your veterinarian right away.