Cranberry
CautionPlain cranberries are not toxic, but large amounts can produce calcium oxalate bladder stones. The emergency is usually the packaging: dried cranberries mixed with raisins, and sugared or spiked cranberry sauce.
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
- Abdominal pain
- Loss of appetite
- Difficult or painful urination
- Blood in urine
More about this food
Cranberries themselves are not a poison. The American Kennel Club says fresh or cooked cranberries, when plain, are not inherently toxic for dogs, and that small quantities of fresh or dried cranberries are fine. The word doing the work is small.
Two things go wrong with quantity. AKC warns that feeding large amounts of cranberries can lead to the development of calcium oxalate stones in a dog's bladder, which matters most for owners dosing cranberry daily for urinary health. That folk remedy is exactly the pattern that builds the risk. If your dog has a stone history or is straining to urinate, do not self-treat with cranberry; get a urinalysis. The other issue is simpler: too many cranberries mean an upset stomach, with vomiting and diarrhea.
The real emergency is what dried cranberries come packaged with. AKC notes that dried cranberries sometimes come mixed with other dried fruits like raisins, and that grapes and raisins are very toxic to dogs, with even a few capable of causing serious problems. Craisins in a trail mix, a granola bar, a bag of studded scone dough, a holiday cheese board, or a bowl of muesli on the counter all fit that description. Cranberry sauce is its own problem: high in sugar, and some Thanksgiving recipes are made with port, Grand Marnier, or other alcohol. Human cranberry supplements may contain xylitol.
If your dog raided a mixed dried fruit product, bring the package and call your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435 now, even if you are not sure raisins were in it. Grape and raisin toxicosis shows GI signs at 6-12 hours but the dangerous rise in kidney values comes at 24-72 hours, so a dog that looks fine tonight is not cleared. Do not induce vomiting at home with salt or hydrogen peroxide.
Frequently asked questions
- My dog ate a handful of dried cranberries. Is that an emergency?
- If the bag holds cranberries only and the amount was small, expect an upset stomach at worst. If it was a mixed dried fruit or trail mix that could contain raisins, call your vet or the APCC at (888) 426-4435 now with the package in hand.
- I give cranberry daily for urinary health. Should I stop?
- Talk to your veterinarian first. AKC warns that large amounts of cranberry can lead to calcium oxalate bladder stones, and human supplements may contain xylitol. Urinary signs need a urinalysis, not a supplement bought on a hunch.
- Can dogs have cranberry sauce?
- No. Canned and homemade sauce are loaded with sugar, and plenty of recipes include port or liqueur. If you want to share, use a few plain fresh or cooked cranberries with nothing added.