The ISPCA is expressing concern over figures released by the Irish Canine Breeders Association ahead of this week's vote on the Dog Breeding Bill in the Dáil.
Of the 90,000 pedigree dogs born here every year, 45,000 are exported to the UK, and 45,000 sold to the home market.
However, the Irish Kennel Club said it is the only official body to register pedigree dogs and certify them for export, and last year they say they registered just more than 700 pedigree pups for export.
Today the ISPCA is asking what happened to the other 44,000 animals.
The IKC says it can stand over its pups because they are microchipped and inspected.
They say figures from the ICBA suggest the UK market is being flooded with unregistered dogs that are supposed to be pedigree.
The ISPCA are calling for the Irish Canine Breeders Association to clarify this situation.
The organisation says that the legislation currently before the Dáil may leave some areas exposed and we may end up with a watered-down Bill.