A lot of people have had some bad experiences with registered and non registered breeders so i thought since we all have experience we could share our tips for anyone who decides they would like to adopt a cat/kitten:
For a pedigree cat,look on varied websites for your chosen breed and research the breeds character,temperament and dietary needs carefully. Then when you find a cattery that you like,check out the guest book's link and read the different comments(sometimes you may be able to contact someone who's also had a cat/kitten from that cattery and you will gain some more in depth knowledge,I would say make sure also that the prefix(name) of the cattery is registered with all 3 Cat Councils-Tica,GCCF and Fife or at least one of these,it doesn't guarantee anything really but it means you have access to any past/present info on cats/kittens.
And if you are satisfied thus far with chosen cattery arrange a visit so you can see where the cats live,how they live and also check out the health of the cats,the temperament and how social or non social the cats/kittens are.

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Dogs have owners, Cats have slaves

Burnthwaites Siamese