Investigations are continuing into illegal dog breeding following a seizure of puppies - believed to have been sourced from the Louth area.
This comes after the Irish Society for the Prevention of Cruelty to Animals (ISPCA) called for a crackdown on illegal behaviour by puppy farmers, after 20 puppies were seized at Cairnryan Ferry Port in Scotland recently. The puppies were then returned to Ireland.
On Monday night a further ten puppies, consisting of Cocker Spaniels, Shih Tzus and Bichon Frise, were seized at the Scottish port.
None of the puppies were microchipped, violating regulations, and they were all too young to be travelling.
"This is yet another example of illegal behaviour by dog breeders in Ireland and we believe this is just the tip of the iceberg," said ISPCA CEO Dr Andrew Kelly.
"Under the Microchipping of Dogs Regulations, all puppies must be microchipped and registered on an approved database before leaving their place of birth.
"It is clear some dog breeders in Ireland are intent on ignoring the law to maximise profit."
He said the Society will continue to work with its partners in the Scottish SPCA and other organisations involved in Operation Delphin to clampdown on the illegal behaviour.
The joint operation is targeting the illegal export of puppies from Ireland to the UK.
The puppies seized this week were returned by ferry to Belfast where they were transferred to the ISPCA's National Animal Centre in Longford.
Dr Kelly appealed to those looking for a dog to adopt one rather than buy one.
"There are many rescue dogs looking for good homes around Ireland and the UK," he said. "Please consider giving a home to one of those dogs instead of buying a puppy that likely came from a puppy farm in Ireland."
The ISPCA is appealing to members of the public to contact the ISPCA National Animal Cruelty Helpline in confidence if they suspect an animal is being cruelly treated, neglected or abused, or in case of emergency to contact local gardai.