USPS Tightens the Rules for Mailing Live Animals Across America
Published Date: 10/19/2026
Rule
Summary
Starting October 19, 2026, the Postal Service is updating rules for mailing live animals to keep them safer and better tracked. If you ship live animals, you’ll now need to number each container, write the recipient’s info clearly, and avoid reusing fiberboard boxes. These changes help protect animals during shipping without extra costs or delays.
Analyzed Economic Effects
6 provisions identified: 1 benefits, 5 costs, 0 mixed.
No Reuse of Fiberboard Boxes
Starting October 19, 2026, fiberboard containers must not be reused for live animal shipments. If you ship live animals, you can no longer reuse used fiberboard boxes for those shipments.
Stronger Box Strength Requirement (W5c)
Shipping containers for mailable live animals must be at least 275-pound test, double-wall, corrugated, weather-resistant fiberboard (W5c) or an equivalent material. This standard applies to any mailable live animal container.
No USPS Flat Rate or USPS Packaging
USPS-produced packaging, including Flat Rate containers, is not eligible for use to ship live animals starting October 19, 2026. Shippers must use non-USPS-approved containers that meet the live-animal container standards.
Multi-Container Labeling and Numbering Rules
When multiple containers are strapped together, a single shipping label should be applied but each container must have its own address label and must be numbered sequentially (for example, "1 of 5"). This rule takes effect October 19, 2026.
Adult Bird Container Marking and Contact Info
For adult bird shipments, each container must display: "Live Birds--USPS Approved Container # (once issued)," complete sender and recipient addresses including phone numbers, and directional arrows showing the "up" position on at least two sides. The Postal Service also recommends writing the recipient's name and address directly on the package in case the shipping label detaches.
Day-Old Poultry Age and Delivery Window
The Postal Service states that day-old poultry must not be more than 24 hours old at acceptance, may be delivered within 72 hours of hatching, and the hatching date and hour must be indicated on the shipment. These conditions apply to shipments involving day-old poultry.
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