Crossing the US–Canada Border
What your dog needs to cross the US–Canada border in each direction — including the 2024 CDC rule and the day-trip trap that catches puppies.
Computed from your inputs · sources shown · estimates labeled · risky questions go to a vet.
Example answer — A US-based owner
Professional advice recommended
Book a non-urgent veterinary appointment.
Entering the US (including returning home)
FactSince Aug 1, 2024, all dogs entering the US must be at least 6 months old, microchipped, and appear healthy. Dogs from low-risk/rabies-free countries need a free CDC Dog Import Form receipt (valid 6 months).
Entering Canada from the US
FactA personal pet dog over 8 months needs a rabies certificate (vaccinated, within 3 years) and no health certificate. Puppies under 8 months, unaccompanied, need a 72-hour health certificate.
Confirm before you travel
Professional guidanceBorder rules change — verify current requirements on cdc.gov (US) and the CFIA / USDA APHIS pages before your trip. (Verified 2026-07-18.)
Watch for
- The trap: the US 6-month-minimum age applies even to a US dog coming home from a Canada day trip — a young puppy can be blocked at re-entry.
4 sources · sources agree
How this was decided — all 4 sources, tiers & dates
- Entry Requirements for Dogs from Dog-Rabies Free or Low-Risk Countries — US Centers for Disease Control and Prevention · Tier 1 · verified 2026-07-17
- Entry Requirements for Dogs from Dog-Rabies Free or Low-Risk Countries — US Centers for Disease Control and Prevention · Tier 1 · verified 2026-07-17
- Pet Travel From the United States to Canada — USDA Animal and Plant Health Inspection Service (summarizing CFIA requirements) · Tier 1 · verified 2026-07-17
- Pet Travel From the United States to Canada — USDA Animal and Plant Health Inspection Service (summarizing CFIA requirements) · Tier 1 · verified 2026-07-17
Rules fired: US entry (CDC 2024) + Canada entry (CFIA) + day-trip trap
Why this answer
To cross the US–Canada border, entering the US (including a US dog returning home) since Aug 1, 2024 every dog must be at least 6 months old, microchipped, healthy, and — from a low-risk country — carry a CDC Dog Import Form receipt. Entering Canada, a personal pet dog over 8 months needs a rabies certificate (within 3 years). The trap: the US 6-month age minimum applies even to a puppy coming home from a Canada day trip.
When this doesn’t apply
- Commercial imports, high-risk-country dogs, and other countries have different rules.
- Rules change — verify current requirements before travelling.
What changes the answer
- Direction of travel (into the US vs. into Canada).
- Your dog's age — under 6 months can be blocked returning to the US.
- The date, since the CDC rule took effect Aug 2024.
Sources
- Entry Requirements for Dogs from Dog-Rabies Free or Low-Risk Countries — US Centers for Disease Control and Prevention · Tier 1 · verified 2026-07-17
- Pet Travel From the United States to Canada — USDA Animal and Plant Health Inspection Service (summarizing CFIA requirements) · Tier 1 · verified 2026-07-17
Common questions
What does my dog need to cross the US–Canada border?
Into the US: 6+ months old, microchipped, healthy, and a CDC Dog Import Form receipt (low-risk countries). Into Canada: a rabies certificate for a pet dog over 8 months. Verify current rules before you go.
Can my puppy come back into the US from Canada?
Not if it's under 6 months — the CDC 2024 rule sets a 6-month minimum age for all dogs entering the US, even a US dog returning from a day trip.