The government vet (on the corner of E-ring road, where it T junctions at the airport) will do it for free. If you are keeping the cats as we did, you will have to purchase a microchip and vaccination at one of the veterinary shops and take this with you.

You will have to confirm this, but they also fix strays that you may catch, then you release them again and do not have to keep them.

You need to drop them off at opening time (7?) and fetch around lunch time (for male cats, may be different for females)