If you live in Northern Ireland and collect the puppy yourself in GB, DAERA confirmed in writing in September 2026 that the journey is non-commercial: the pup needs a microchip and must be at least 8 weeks old, with no pet travel document, rabies jab or tapeworm treatment. If the seller or a courier delivers it, it is commercial, and the pup is in practice about 15 weeks old before it can travel.