2309.90.42.10 - Milk replacer

This HTS classification, 2309.90.42.10, specifically covers milk replacers. These are formulated feeds designed to substitute or supplement milk for young animals, typically calves, piglets, or foals, during their weaning or post-weaning stages. Milk replacers are characterized by their high nutritional content derived from milk components, such as skimmed milk powder, whey, or milk protein concentrates, often combined with other ingredients like fats, vitamins, and minerals to ensure proper growth and development.

The distinction between this category and its sibling, 2309.90.42.90 (Other), lies in the specific designation as a milk replacer. While both fall under "Animal feeds containing milk or milk derivatives," this sub-category is for products explicitly intended and formulated as a primary milk substitute. The "Other" category would encompass animal feeds containing milk derivatives that are not specifically formulated as milk replacers, such as supplements or general animal feeds where milk derivatives are a secondary ingredient.

As this is a leaf node, there are no further subcategories to introduce. Classification within 2309.90.42.10 is dependent on the product meeting the definition of a milk replacer and also satisfying the conditions of general note 15 of the tariff schedule, which typically relates to specific entry requirements or documentation for certain types of goods. The precise composition and intended use are key determinative factors for classification under this heading.