Chickens weighing 185 grams or less are classified under 010511, which typically captures day-old chicks and very young birds destined for grow-out operations. Birds exceeding that weight fall under 010594. The weight is assessed per bird at the time of export, and commercial invoices should specify individual bird weights to support correct classification.

USDA APHIS can suspend imports from affected regions very rapidly — sometimes within days of a confirmed highly pathogenic avian influenza detection — on a regionalization basis. Importers relying on a single source country for breeding stock or day-old chicks face significant supply-chain disruption risk and should monitor APHIS notices closely.