It can be because of depression, loneliness, or simply the will to die. There's no way to force them to eat and some stop eating and let themselves starve to death. I ask why one male had a large lump on the top and back of his head. Ruben says he was hit. It would not have been another ostrich but that they run into the fences and mess their heads up easily.
Many birds have almost no feathers on their backs.
Fred says it's because the others eat them. Fred wants me to see the dead pile. We park and walk over to where three ostriches lie dead. One is full grown and has had his chest eaten away by a wild animal. One was three months old and died in transit.