SAGE, feral foal rescue

we have named her Sage, we rescued her from the range lands May 2021 there seems to be an epidemic of foals being injured on the range lands near our place. this day started with us hiking to photograph the stallions, we know this is active breeding season, and with the amount of stallions on this range right now, we knew there would be a lot of stallions fighting for their mares. there is easily 100 horses in this herd, about 15 grown stallions the herd stays in this location for about 20 mins and then they shift and all start running down hill. We stay and watch for a minute and then race back to the van to try and catch up to them crossing the road; we miss them as they gallop across the sagebrush. We stop and watch them go, then we hear her... A mare calling... one of the stallions stop and call back to her.. The stallion is urging the mare to follow, we know already with a sinking heart, the only reason a mare is not leaving a spot with her herd, is a foal. The mare cho