# Age requirement for all dogs · United States — The dated, ordered steps for taking a dog, cat or ferret into the United States, the European Union or Great Britain — microchip, rabies vaccination, blood test and the waiting periods between them, quoted from the law itself

For Age requirement for all dogs · United States, entering is United States; provision is Age requirement for all dogs; applies to is All dogs presented for admission into the United States; what is required is must be at least six (6) months old at the time of their arrival into the United States; the clock is at least six (6) months old, recorded from its source on 2026-08-28; source re-checked 2026-09-15.

- **Entering:** United States _(verified: appears in the quote below)_
- **Provision:** Age requirement for all dogs _(verified: appears in the quote below)_
- **Applies to:** All dogs presented for admission into the United States _(verified: appears in the quote below)_
- **What is required:** must be at least six (6) months old at the time of their arrival into the United States _(verified: appears in the quote below)_
- **The clock:** at least six (6) months old _(verified: appears in the quote below)_
- **If it is not met:** shall be denied admission and returned to the country of departure _(verified: appears in the quote below)_
- **Citation:** 42 CFR 71.51(f) _(our reading, not quoted from the source)_

## What the source says

> Age requirement for all dogs. (1) All dogs presented for admission into the United States must be at least six (6) months old at the time of their arrival into the United States. (2) Dogs arriving into the United States that are not at least six (6) months old at the time of their arrival shall be denied admission and returned to the country of departure

## Source

- https://www.ecfr.gov/current/title-42/chapter-I/subchapter-F/part-71/subpart-F/section-71.51

Last verified: 2026-09-15. Review by: 2026-12-26.
Part of [The dated, ordered steps for taking a dog, cat or ferret into the United States, the European Union or Great Britain — microchip, rabies vaccination, blood test and the waiting periods between them, quoted from the law itself](https://referencesource.org/pet-travel-entry-requirements/).