What is everyone's opinion on line breeding? The good, the bad? Never agree with it or circumstances it should be done? Specific breed you wouldn't recommend or at least keep to lowest COI as possible? I know the UK KC has certain restrictions on it? Do they also let you check COI on potential breedings? I thought I heard this solve where. I think registries should have this available. I believe the gene pool in the UK for some breeds is probably smaller than the US, but certain breeds across the board have a small amount of diversity. People have the option to use dogs in other countries as well. It seems a lot is dependent on breed. Some breeds lack diversity, have small effective founder population, have polygenic health disorder that is spread in most the breed due to founder effect or popular sire issues, ect. I don't believe there is necessary a simple answer when it comes to line breeding, but I do believe breeders should try to keep diversity while still preserving the breed. This does not mean never line breed, having differing lines can keep diversity within a breed, you will have unrelated dogs to breed to, but if everyone starts breeding the same line (or few lines) or popular sire, ect the gene pool will quickly narrow. This has been done in a number of breeds. There is more to deciding on a breeding than COI or pedigree, but it is a topic worth discussing I believe.