Is it harmful to your cockatiel feed tapioca pellets?

No, it's not harmful for cockatiels to occasionally eat tapioca pellets. However, it should not form a major portion of their diet and should only be given as treats or occasional snacks. Tapioca is relatively low in nutritional value and high in carbohydrates, so you should offer primarily nutrient-rich foods like formulated cockatiel pellets, seeds, fruits, vegetables, and fresh water to ensure a balanced diet that meets your cockatiel's nutritional needs.