going over to NI and getting EU pet passports
Absolutely - if you can get a passport in the EU it does make it a lot cheaper. I recently paid €48 for a three year rabies booster and pet passport.
A few things to think about - most vets want to re-do the rabies vaccine. So, even if your dog already has a current one, you may need another. Some dogs used to fail the titre test (which used to be required after a rabies vaccine to check the levels of antibodies) and would need the vaccine repeated so having two within a short timescale isn’t a major concern BUT I AM NOT A VET, CHECK WITH YOURS BEFORE DOING THIS.
If you get the rabies vaccine re-done, the date of vaccinating mustn’t be recorded in the new passport earlier than the ‘chip read’ date, otherwise it doesn’t prove the vaccine was administered to this dog.
Some vets use an annual vaccine rather than a three year one.
Any future rabies vaccines can’t be done and recorded by UK vets, as that would invalidate the passport.
If you decided to go to France for the pet passport because it isn’t that much harder than going to Ireland, French vets are
supposed to make sure the dog‘s chip is registered on the I-CAD (Identification des Carnivores Domestiques) system and for that, you need a French address and the dog needs to be in France for more than three months - which is unlikely, given the 90/180 day rule. There are a few vets who are still issuing passports without that check, but they are becoming rarer. It might be worth a trip over into Belgium if you were doing that.