2309.90.42.90 - Other

This classification, HTS Code 2309.90.42.90, encompasses "Other" preparations of a kind used in animal feeding, specifically those that are not milk replacers. This category is designed for animal feed formulations that contain milk or milk derivatives but do not fit the specific criteria of a milk replacer. These products are typically intended as supplementary or complete feeds for various animal species, where milk components are included for nutritional or palatability benefits beyond those of a primary milk substitute.

Unlike its sibling category, 2309.90.42.10 (Milk replacer), which focuses on products specifically formulated to replace whole milk or colostrum for young animals, this category captures a broader range of milk-containing animal feeds. Examples might include certain types of calf starter feeds, piglet prestarter feeds, or specialized pet foods where milk derivatives are an ingredient but not the sole functional component. The key distinguishing factor is the presence of milk or milk derivatives as an additive or component within a more complex feed matrix, rather than its primary role as a milk substitute.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Therefore, classification within 2309.90.42.90 relies heavily on the precise definition of "milk replacer" in the preceding sibling category and the general requirements outlined in general note 15 of the tariff schedule. Importers and exporters should carefully examine the composition and intended use of their products to ensure they accurately fall under this "Other" designation when milk or milk derivatives are present and the product is not primarily functioning as a milk replacer.