About a week ago i found a pile of feathers and the hen they belonged to was gone. All feathers were outside of the run. None inside. I assumed she got out and dogs got her. We covered the run with thin netting to deter then from escaping. Its not totally secure but i was hoping it would help. Today, we found several piles of feathers and the hen they belong to is gone. One small pile INSIDE the run this time, a couple large piles outside in different areas. Small piece of wood holding up netting was broken near inside pile. I have 6 larger hens than the two that have gone missing still completely fine (and now on lockdown inside the barn!) Please help me guess what could be doing this!