Ahhh, but Al, some of us…many of us?…are newbies. I know I am, sitting here waiting for my first litter to be born any day…hour?…minute?…second?… now. I’m seeing what you call “belly drop” here towards the end, but just from looking I would not have recognized that my pig(s) were pregnant until the last month or so. Having a way to know shortly after breeding if it “took” or if I needed to get a pair back together again would have been helpful.
You gotty remember…a lot of us are like Sgt Schultz on “Hogan’s Heros”….”I know nothing!”.
That brings up a question. When I first wean the litter the sow will come back into estrus in 3-5 days, right? I plan to have her in a breeding pen after weaning and bring the boar there. After I see them breed (the purpose of a breeding pen for me, as I can’r see everywhere) and I turn them back out to pasture, do I bring them back to the pen 21 days later and see if they breed again? If I just leave them out in the pasture I don’t know if they breed again or not, unless I just happen to be nearby at the time.