I HAVE A HEIFER THAT IS SUPPOSED TO CALF SOON. SHE HAS A STRING OF SOMETHING HANGING OUT OF HER BACKEND. IT IS BLACK IN COLOR AND DRY LOOKING. I CANT GET CLOSE ENOUGH TO TOUCH IT THOUGH. SHE HAS A MILK BAG AND ONE TEET LOOKS FULLER THAN THE OTHERS. SHE IS ALSO LOOKING BONIER IN THE HIPS THAN...