From USDA’s perspective, highly pathogenic avian influenza or H5N1 are the most scientifically accurate terms to describe this virus. At this stage, we do not anticipate the need to depopulate dairy herds. For dairy herds, APHIS discloses the number of herds, but not the number of individual animals. Why is APHIS taking a voluntary, rather than mandatory, approach to testing dairy herds? For context, there are more than 26,000 dairy herds nationwide.