au contraire!
I don't think a % of progeny was his goal, the quality of said progeny was.
As such, if he only had a 40% turn out, I think that he set pretty high standards. More over, he was honest enough to evaluate them accurately rather than being breed or bloodline blind.
If more people judged their progeny as strictly, and the bottom 50% of every litter were considered culls, we would have a lot better performing dogs on average!
Steve
Id be happy with 40%. If your only goal is for the dogs to bay, then yeah 40% is no good.
If you want them to bay well, start early, range far, have a cold nose, closed mouth, certain build, tough pads, loads of bottom, etc. Then 40% is pretty good.
My opinion