I have let them get to the age of harvest (as meat rabbits) they do fine, but the legs do not correct, and actually can get worse as they grow. After I harvested them, I inspected their hind legs carefully and there was no evidence of old injury, and the joint appeared normal, meaning not inflamed. The angles were just wrong. I don't think, based on the lack of inflammation, that they are in any pain. It is just a conformational defect, like bowleggedness in humans. The rabbit will be ok, but making more of them seems less than ethical to me.