The CARO database for pet owners provides information on a variety of topics relevant to European pet owners, including acquiring / adopting a pet, living with a pet, and knowing the law. Specifically, it includes information about the law, such as regulations on identification & registration, sterilisation, and travelling.
External Link:
You can access the resources in the link below:
https://www.caro-project.org/caro-database/caro-for-pet-owners