I must say this with arthritis is not only new for me (I believe it as you all mention it!), but it also convices me for voting against breeding folds.
Every man and women must decide for themselves, of course. But I do vote against.
I remember me weeping at one exhibition of our local club, looking at these poor pitiful shredded ears more or less in pieces... although Later on I was comforted knowing it was a good breeder who took care about her cats and their welfare. And knowing also most folds didnt had such pronounciated shreds. I thought the cats when delivered, WAS healthy and sound - save these pitiful ears in some cases.
But this arthritis sounds not good to me.
Look. If I did breed say, the very sound Russian blue (where I WAS engaged, although as owner of studs, and as freelance cowriter to the swedish paper for russian blue). I wouldnt not used for breeding an animal which I knew had genetic bound for arthritis! Not if I had any useful alternative.
I can understand with a small genetic base you cant always choose much, and I had been learned you must sometimes accept a breeding animal with known bad genes. ALL individuals have some bad genes, but usually you dont know about them. Although you can discover this if you say, use the same popular stud all too often...
But you dont choose voluntarily a breeding animal with known, serious sickedness, if there is choice!
Look. We had a dramatical quarrels about colour point gene in russian blue (and in sibirian cat this discussion was even harder). The beareres were hunted down, etc.
But in the end we in the russian blue world did come to a reason: There are so many bad genes to hunt down.
We dont want to breed on the colour point gene, the "masqued" russians, but it is at last not in any way dangerous for the born individual. They are in themselves perfectly healthy in body and mind, as good russians almost always are.
So, lets hunt with fire the real bad genes, but lets take it easy with the not welcome, but not dangerous colourpoint... And thus, the pointed russians looking as old type siamese with masque, are neutered and becoming pet cats, but known bearers are allowed in breeding.
This written as a private person, not necessarily as Advisor of the Forums.