Arriving in Colorado with a dog
What Colorado requires when a dog arrives — whoever you are arriving from. These rules hang off the arrival, not the trip type: a flight from Frankfurt and a flight from Los Angeles are treated the same here. Requirements can change — always confirm with the authority before you travel.
🏛️ Additional rules for Colorado
These requirements come on top of the country's — they can only tighten or add, never loosen.
Microchip Required
For dogs, Colorado requires an ISO-compatible microchip.
⚠️ The source names the microchip for dogs only, not for cats.
Rabies vaccination Required
From 3 months of age, proof of a current rabies vaccination is required. The vaccination date, manufacturer and serial number must appear on the certificate or in the pet passport.
Health certificate Required
Colorado requires a Certificate of Veterinary Inspection (CVI) issued by an official veterinarian within 30 days prior to entry.
⚠️ Relief for EU travellers: the pet passport can replace the certificate — "European Pet Passports may be used in place of CVI: If there is certification ON the passport by an official veterinarian that the pet has been examined within 30 days of arrival in Colorado and found to be free of contagious or communicable disease." The endorsement must be IN the passport; a passport without it is not enough.
🗓️ Read at the state authority on 01/08/2026.
Source: https://ag.colorado.gov/animal-health/small-animal-international-imports
Arriving from abroad? The rules of USA
Arriving from Germany/the EU, the national entry requirements of USA apply on top. Arriving from another part of the same country means crossing no international border — then only the section above applies.
🔴 Required
Import permit Required
No classic import permit needed, but the CDC Dog Import Form is mandatory for all dogs: complete online at cdc.gov/importation/dogs before travel (DogBot); allow 2–10 business days; bring the receipt to the airport.
Microchip Required
Yes – readable by universal scanner
Minimum age / young animals Required
Dogs: minimum age 6 months (CDC requirement).
Health certificate Required
Not required by CDC, but by most airlines (usually issued within 7–10 days of travel) and by some states. Check your airline’s deadline before booking; states we have captured are listed below under “Additional rules”.
🟡 Recommended
Rabies vaccination Recommended
Not required from low-risk country (recommended)
Rabies titer test Not required
No (from Germany)
Other tests Not required
No additional tests required.
Parasite treatment Not required
Not required
Official endorsement of the health certificate Not required
CDC does not require a health certificate for entry into the United States – and therefore no endorsement by a veterinary authority either.
Quarantine Not required
Keine
Registration Recommended
State/municipal rules
🐾 Local rules (in-country)
These apply on the ground in the destination country — to everyone, not as an entry condition — and depend on the breed and situation (e.g. public transport, listed breeds).
Breed restrictions On site
No federal breed bans (states/municipalities vary)
Muzzle / leash On site
State/municipal rules
⚠️ Notes & grey zone
Grey zone
Dog must be ≥6 months old; states may differ
Notes
CDC: only required document is the CDC Dog Import Form (free, online, one per dog, receipt valid 6 months); dog must appear healthy on arrival. USDA and destination-state rules apply in addition; commercial (resale) imports have extra USDA requirements.
Authority: CDC (Hunde) + USDA APHIS
Read at the responsible authority on 30/09/2026. 📄 Official source ↗
Check your specific route & airlines →For informational purposes only. Regulations change frequently — verify with the relevant authorities before travel.