Dairy producers tighten biosecurity as new H5N1 cattle transport rules take effect

Dairy operations across several states are adjusting cattle movement plans and on farm biosecurity protocols following USDA changes tied to the ongoing H5N1 avian influenza response in dairy herds.

Federal animal health officials are now using a tiered surveillance system that changes testing requirements depending on a state’s disease status. Dairy cattle from states meeting federal surveillance benchmarks can move across state lines with fewer testing restrictions, while herds in affected regions continue facing additional monitoring requirements.

The updated approach is shifting more responsibility onto routine bulk milk testing programs and state level surveillance efforts. Industry veterinarians say the changes are designed to reduce transportation delays while still tracking possible virus activity inside dairy herds.

Several dairy cooperatives in the Midwest have reportedly increased internal biosecurity recommendations during the spring livestock movement season. Producers are being encouraged to isolate newly arrived cattle, disinfect transportation equipment and limit unnecessary outside traffic onto farm sites.

Livestock auction operators are also watching the situation closely as more dairy replacement cattle begin moving between states heading into summer. Some sale barns have added extra sanitation procedures around unloading areas and holding pens following guidance from state animal health agencies.

Researchers continue studying how the virus behaves inside dairy cattle after early outbreaks raised concerns about transmission through milk production systems. While infections in cattle have generally been milder than cases seen in poultry flocks, dairy economists say even isolated outbreaks can create major financial pressure through lost production, added testing costs and disrupted cattle movement.

The cattle industry is also monitoring export implications tied to the outbreak. Some international buyers continue requesting additional health documentation tied to dairy products and breeding stock shipments as federal surveillance programs expand.

State veterinarians across the Plains and Midwest say producers should expect surveillance and monitoring efforts to remain in place throughout the summer migratory bird season as officials work to prevent additional spillover cases between wildlife, poultry and livestock operations.