slowed reproduction

i have several 1.3 and 1.2 colonies reaching about 11 months of breeding. reproduction has nearly stopped. when this happens is it the male or female that cant seem to get it done.

i think i should have fed off and reestablished these breeders a couple months ago. the trouble is numbers have been down and the only survivors have been female. now im out of males in the grow outs. if i replace my old females with new ones would the old males still have the drive/potency to be productive?

does anyone happen to have like a colony/litter tracking spreadsheet they'd be willing to share?:please:

With Asf's, it has been said to breed them for about six months then feed off.

I have no problems with my older females reproducing. I have a female who is 2 years old, and has a beautiful, fat litter of 6.

Sometimes, ASFs just don't get the job done. Lots of people experience difficulty getting them to breed. There must be some environmental factor that causes it, I think. Weather? Temperature? A certain smell? Who knows!