Every dog is different. Individual allergies and sensitivities are common — always introduce new foods in small amounts and watch for adverse reactions. This site is for informational purposes only and is not veterinary advice. Always consult your vet.
The Full Picture
Whether cereal is safe for dogs depends entirely on the type. Plain, low-sugar cereals like plain Cheerios or puffed rice can be given in very small amounts as an occasional treat. However, most breakfast cereals are loaded with sugar, artificial flavourings, chocolate, raisins, or artificial sweeteners — all of which are harmful or toxic to dogs. Chocolate and raisin cereals are particularly dangerous. Even "healthy" cereals often contain too much sugar for dogs. Cereal also has minimal nutritional benefit for dogs and the carbohydrates contribute to weight gain. Never serve cereal with milk, as many dogs are lactose intolerant. If you want to give your dog a cereal treat, stick to a few plain, unsweetened pieces.
What You Should Know
While cereal is not outright toxic, there are important precautions to bear in mind before sharing it with your dog. Portion size matters, and certain preparations or varieties may be unsafe. If your dog has any existing health conditions, check with your vet first.