HAD A FOAL BORN THIS MORNING AND EVERYTHING FINE WHEN WE FOUND HER, BUT THERE WAS ON SIGN OF THE SACK OR ANY AFTERBIRTH. NEVER HAD THIS BEFORE. WE CAN USUALLY AT LEAST SEE SIGNS OF WHERE A MARE HAS HAD THE FOAL. SHE WAS IN A FAIRLY SMALL PASTURE, BUT FOUND NOTHING. DOES THIS MEAN SHE HASN'T PASSED EVERYTHING. IS THER ANYWAY TO TELL EXCEPT TO TAKE HER TO THE VET. ALSO, HE IS CLOSED TODAY SO HOW LONG CAN WE WAIT?