New puppy and kitten owners often want to bring their new family member home as soon as possible. But very young animals have fragile immune systems, need frequent feeding and can't regulate body temperature well. Legal rules also set minimum ages for some routes.
Health considerations
- Weaning. Puppies and kittens should be fully weaned and eating solid food reliably before travelling without their mother. Many breeders and shelters don't release them before about eight weeks, and some wait longer.
- Vaccinations. Young animals are vulnerable to diseases like parvovirus in puppies and panleukopenia in kittens. Travel before their vaccine series is underway increases the risk. Ask your vet about timing.
- Blood sugar. Tiny breeds in particular can develop low blood sugar if they go too long without food. They need small, frequent meals.
- Temperature. Young animals chill and overheat more easily than adults.
Border rules
- Into the U.S.: Dogs must be at least six months old to enter the U.S., with a microchip and a CDC Dog Import Form receipt. This rule catches many people buying puppies from U.S. breeders to bring home from Canada, then needing to cross back, or Canadians planning to move with a young dog. See our CDC Dog Import Form guide.
- Into Canada: Dogs and cats three months and older need a valid rabies vaccination certificate. Puppies under eight months imported for commercial purposes (resale, breeding, rescue adoption) face stricter rules. See our article on CFIA rules for dogs and cats.
Airline rules
Airlines set their own minimum ages for pets, often at least eight weeks for domestic flights and older for international travel, and some add extra requirements. Check before you book.
Tips for travelling with young pets
- Small, frequent meals and water at every stop.
- Plenty of absorbent pads. Accidents will happen.
- Warm, soft bedding and a snug crate.
- Minimal contact with other animals and public areas until vaccinations are complete. Potty breaks should avoid busy dog areas at rest stops.
- A familiar scent, like a cloth rubbed on the mother or littermates, can help.
Should you wait?
Sometimes waiting a few extra weeks means an easier trip, fewer health risks and no border problems. It's worth asking your breeder or rescue whether a later pickup date is possible.
4Paws Movers carries young pets on dedicated trips, away from other households' animals. Tell us your pet's age and vaccination status when you request a quote.
Planning a move with your pet?
4Paws Movers offers dedicated, climate-controlled ground transport across Ontario and cross-border into the U.S., plus airport cargo drop-off. Every fee is published.