C, must be something in the water around here as we have 1-5 sets a year.
Couple years ago we had 3 sets in the heifers. But at least with heifers(calving out the front window) it is easy to figure out.
Found a little dead newborn calf the other day out with the main herd. It was licked off and obviously had been alive for a day or so. Probably a rejected orphan that never nursed. Maybe a calf that got stepped on.
Try to listen and look for 'weak' calves but you're not gonna see everything.
