1. Austria
2. Belgium
3. Bulgaria
4. Croatia
5. Czech Republic
6. Denmark
7. Finland
8. France
9. Germany
10. Hungary
11. Ireland
12. Italy
13. Liechtenstein
14. Lithuania
15. Luxembourg
16. Malta
17. Montenegro
18. Netherlands
19. North Macedonia
20. Norway
21. Poland
22. Portugal
23. Romania
24. Serbia
25. Slovakia
26. Slovenia
27. Spain
28. Sweden
29. Switzerland
30. Turkey
31. United Kingdom
It's worth noting that there may be specific regulations and restrictions regarding the possession and care of ferrets in each of these countries. For instance, some countries may require permits or licenses to own ferrets, or they may have certain housing and welfare standards that must be met. It is important to research and understand the laws and regulations in the specific country or region you are interested in before obtaining a ferret.