The yearling was getting scolded by his mother. She did not want him eating the plastic and actually lifted her leg several times striking him, trying to get him to move away and follow her into the woods. Just like horses, the key deer express a variety of emotions through their ear movements. Laid back ears can mean feeling threatened or some kind of anxiety. Straight up ears can mean curiosity and friendliness. Stay your distance from any mammal with laid back ears.