One of my hens died suddenly earlier I believe it was a heart attack apparently naught on by stress IV been told that they beat Thera wings constantly then drop dead after the death if this bird the rest of what was a four bird flock have started flapping their wing for no apparent reason one inperticular seems to be extremely stressed about something and puffs her feathers out whenever she seas me she produced the poo after the death of her best friends as I got them at the same time the other two later on is it an infection am I going to lose my whole flock is it something I'm doing can I prevent it