evidence: Northern Ireland is part of the EU Pet Travel Scheme so you can use a pet passport issued in an EU country, including the Republic of Ireland, to bring your pet into Northern Ireland. Your pet will need to: [...] Great Britain is outside the EU Pet Travel Scheme so there are different rules around bringing your pet to Northern Ireland from Great Britain. Before you travel, you should check the Northern Ireland Government website or Gov.uk: Taking your pet abroad to make sure you adhere to the latest requirements. [...] Pets travelling from the Republic of Ireland to Northern Ireland or vice versa should be microchipped, vaccinated against rabies and meet any additional requirements. They must also be accompanied by either a valid Animal Health Certificate (Great Britain residents) or an EU pet passport.