Yes, dogs can eat Halo oranges.
Halo oranges are relatively healthy for dogs to eat because they contain lots of vitamin C, vitamin A, potassium, and calcium.
Fruits are generally healthy for dogs to eat because they are high in vitamins, fiber, and antioxidants which promote a strong immune system.
The most beneficial fruits for dogs are berries because they have the highest concentration of antioxidants out of all fruit varieties.
Other fruits that are quite nutritious include apples, bananas, grapes, and cantaloupe.
What makes oranges less healthy than the majority of fruits is that they are very high in sugar; this means that if your dog consumes too many oranges their blood pressure could rise which can contribute to various health problems like diabetes and obesity over time.
Oranges are also a type of citrus fruit so they contain the potentially harmful chemical citric acid which can cause stomach irritation.
The reason oranges are not as good for dogs to eat as other fruits are because of their relatively high sugar and citric acid content, but they are still a fine treat in moderation.