The short answer: It depends.
The long answer: A by-product of milk, yogurt is created through the fermentation of lactic acid bacteria. Dogs’ bodies do not possess high amounts of the enzyme lactase, making it difficult for them to break down the lactose found in yogurt. As such, yogurt and other milk-based products can give dogs gas, diarrhea, digestive upset, mild distress, and vomiting. It can also trigger his allergies.
If your dog has no problems consuming milk, yogurt may be a meal additive that you can occasionally add to his regular kibble. A spoonful of plain or non-fat yogurt can provide probiotic benefits which can improve his digestion and help him stay full longer. Just make sure to read the food label and look out for ingredients such as xylitol and chocolate which are poisonous to dogs. Consult with your veterinarian to guarantee that your dog will benefit from eating yogurt.
What to do if your dog accidentally eats yogurt: Straightaway try to determine if the ingested yogurt contains any xylitol or chocolate. If yes, see a vet immediately. If it looks harmless, observe for any signs of food allergies or lactose intolerance. If your dog is allergic to yogurt, he may start to itch or develop skin or ear infections. If he is lactose intolerant, gas, diarrhea, and other digestive problems may manifest. If any of these symptoms occur, call or bring him to the vet immediately.
In summary: Yogurt may be a welcome addition to your dog’s meal if he is capable of digesting it properly and if you’re sure about its exact contents. But since most dogs are known to be lactose intolerant, it might be safer for your pet to stay clear of this milk-based product. Instead of yogurt, you can serve him all-natural refrigerated or frozen fruits which he will equally enjoy.