From a legal point of view, feed materials, compound (US: formula) feed, additives and premixtures have to be differentiated. A further split of compound feed into complete or complementary pet food (US: supplement) is done based on the [[Nutrients|nutrient]] content and the ability to fulfil the nutritional requirements except for [[Water - Nutrition|water]]. Additional categories can be defined depending on the intended purpose of the product, e.g. dietetic petfood or milk replacer. | From a legal point of view, feed materials, compound (US: formula) feed, additives and premixtures have to be differentiated. A further split of compound feed into complete or complementary pet food (US: supplement) is done based on the [[Nutrients|nutrient]] content and the ability to fulfil the nutritional requirements except for [[Water - Nutrition|water]]. Additional categories can be defined depending on the intended purpose of the product, e.g. dietetic petfood or milk replacer. |