I'm not sure everyone will agree but my theory is this, it varies from year to year, and I don't know why, but whenever the pup dispersal is for that year, the calling can be unreal. The pups of the year seem to stay together for a while and after ma and pa kick them off on their own they are absolutely a blast. I've seen it from Sept. plumb into Jan.. Maybe Doc or Steve can explain why it varies so much from year to year, but I have killed as many as five all together, all at one stand, and I theorize, all of the same litter. And they are dumber than dirt. I hope the biologists have a better answer, or at least a reason why. I'm sure Wiley E would know about this also. I've seen the same thing around traps and M44's also. They will come in a bunch, say to a water hole, and if you have enough equipment out, you'll have several of them. Just my 2 cents worth, and that really is all it is worth.