We were watching this sow and her two coy wander in a field digging for food in the late afternoon. It was a managed situation by Park employees and volunteers and when she started to get too close to the crowd, we were ushered back to our vehicles. I was lucky enough to catch this split second action when the cub started sniffing right where mom was digging - evidently a little too close! She let the little guy know it was inappropriate behavior and it was over before it started. They both went back to foraging as if nothing had happened.