--- type: restriction id: usps-warm-blooded-animals-cats-dogs-guinea-pigs-hamsters-mice-rabbits-rats-squirrels asset: shipping-restrictions-by-class title: "warm-blooded animals (cats, dogs, guinea pigs, hamsters, mice, rabbits, rats, squirrels) — Postal shipping restrictions by item category" sources: - https://pe.usps.com/text/pub52/pub52c5_008.htm source_quote: "Warm-blooded animals, except for adult birds and specified day-old birds under the specific conditions in this section, are not mailable." generated: true harvested: 2026-08-04 stale_after: 2027-08-04 item_category: "warm-blooded animals (cats, dogs, guinea pigs, hamsters, mice, rabbits, rats, squirrels)" carrier: "USPS" restriction_type: "prohibited" scope: "all domestic mail" conditions: "Warm-blooded animals, except for adult birds and specified day-old birds, are not mailable; nonmailable list includes cats or kittens, dogs or puppies, guinea pigs, hamsters, mice, rabbits, rats, squirrels and flying squirrels" verified: false unverified_fields: carrier, conditions, item_category, scope --- **Item category:** warm-blooded animals (cats, dogs, guinea pigs, hamsters, mice, rabbits, rats, squirrels) **Carrier:** USPS **Restriction type:** prohibited **Scope:** all domestic mail **Conditions:** Warm-blooded animals, except for adult birds and specified day-old birds, are not mailable; nonmailable list includes cats or kittens, dogs or puppies, guinea pigs, hamsters, mice, rabbits, rats, squirrels and flying squirrels > Warm-blooded animals, except for adult birds and specified day-old birds under the specific conditions in this section, are not mailable. Source: