Hi goat girl,
to be frank, there are probably hundreds of products you could try using, and for every product there are going to be trials that show that the product is good, and other trials that show the product is no good.
Just a couple things off the top of my head that have given me good results:
- putting calcium blocks out for the does before kidding and through lactation has given me less prolapses, stronger heavier kids, stronger does
- supplementary feeding with some grain/pellets the last month before kidding and the first 6 wks of lactation again has resulted in stronger heavier kids, increased doe weight at weaning, fibre quality and yield
- flush feeding at joining, along with the buck effect, increases the twin percentage
There are probably others I havent thought of atm