I think the problem for now is more pronounced with dogs than cats, but I just checked my Maine Coon breeder's site. Out of their two current litters, only one

I think the problem for now is more pronounced with dogs than cats, but I just checked my Maine Coon breeder's site. Out of their two current litters, only one is from one of their own cats; two are from other breeders in the same country, and one is from Holland. On their planned litter page, only two cats out of six are from their own lines. The rest are from other Swedish lines, Holland, and Italy. I think responsible breeders do already do this. I worry that as cat breeding progresses, standards will slip like they have with so many dog breeds. It's already started with some breeds.