Arie brings up an interesting topic,spurs.I have had females that have it(single spurs-not double or multiple) as hens for decades.It has always been 10% or less,they do not have it as pullets.It is a defect with a cut for showing and not a disqualification. It is such a small thing I pay no attention to it and if on an otherwise good female I breed from her and many of her daughter do not have it. It does not affect fertility or egg production.It is so far down on my list it hardly registers.On the other hand I know of a bantam breeder that I help,that had spurless males that were disqualified as cocks for not having spurs.Some of these things go back to having to double mate.Double mating is something I have always disliked and avoid doing.It is such a wasteful practice.I can see doing it for a short period to correct or compensate mate,but long continued results in sub-varieties.It wastes space,feed,and time,which most of us cannot afford to do.You can double mate(pullet bred or cockerel bred) for many things,combs,color,etc.,but why?I will always remain a fan of single mating.I think it is also misleading to have varieties in the standard that cannot be bred from a single mating.There are many such examples that could be made.