Well, better not give your dog oranges.
Oranges are not essential part of dog’s regular diet.
Some dogs like oranges but you should be careful with the amount because oranges contain citric acid. Too much of it can upset dog’s sensitive digestive system. So when you give oranges to dogs, few slices without peel should be more than enough.
Do not forget to throw away the peel because it contains citrus oils that are toxic to dogs.