THE REVENUE has seized three puppies and an adult dog at Dublin Port that were bound for Britain.
The German Shepherds were discovered after a British national was stopped and questioned during a routine check.
None of the dogs had pet passports or microchips as required by law.
The animals are now being cared for by the DSPCA.
A follow-up investigation is ongoing.
On Friday, 27 puppies and young dogs were returned to Ireland after being discovered concealed in a van at Cairnryan ferry port in Scotland.
They are now being cared for by the ISPCA.