Dogs can safely eat mandarins in moderation, but it is important to feed them properly prepared mandarins. This means removing the peel and seeds, as the peel contains essential oils that can upset a dog’s stomach and the seeds may pose a choking hazard. Mandarins are not toxic to dogs and contain beneficial vitamins and fiber, but their high sugar content means they should only be given as an occasional treat. Overconsumption can lead to digestive upset or health issues like obesity or dental problems. Always introduce mandarins slowly into a dog's diet and consult a vet if the dog has health conditions or is diabetic. Overall, peeled and seedless mandarin pieces can be a healthy and tasty snack for dogs when given sparingly.