I dont breed a lot and usually only breed when I need new young dogs coming up. So I almost never do a second breeding. I usually am looking forward and not really looking for quantity.
That said I think everyone is spot on about the dogs getting hunting. How many guys are going to struggle through times of hunting puppies solo, coming home empty handed, and really put the time, effort and boat leather to make a top notch dog. Really the breeder and a close knit group around them will put in the effort. We have all seen it. A nice promising dog is passed around to 4-5 homes before it its 2 years old. That dog has no chance compared to a dog in the same stable kennel hunted several days a week at the same age.
Genetics is a big big factor. Time and resources are so limited I believe there are more hog dogs born than ever get made.
My $.02 cents that aint worth more than a pile of dog crap!
