From 1 February 2020, there will be new rules governing the sale or supply of pets. If you sell or supply five or more pets in a calendar year you must:

- Register with the Department of Agriculture, Food and the Marine
- Maintain records regarding pet animals kept for sale or supply
- Include certain information if you are advertising the sale of an animal, including the microchip number in the case of dogs
- Not sell or supply pets under a certain age (8 weeks in the case of dogs)

These rules are set out in the Animal Health and Welfare (Sale or Supply of Pet Regulations) 2019 and in an Information Note (pdf) from the Department of Agriculture.
The Department has also introduced a new Code of Practice for sellers or suppliers of pet animals.