Calves and trees

While they have plenty of hay to eat, the calves get bored, are mischievous, and get into trouble.   Their latest (mis)adventure is they have taken to breaking off branches of two of the new evergreen trees I recently planted.   When I looked out this morning I thought the trees looked odd.  One heifer was still there tearing branches off a tree when I walked up.  I placed a roll of wire fencing around each of the two trees.

These photos make the calves look thinner than what they actually are.