Ive had my young hens only since early december. 4 different hyrbids. One of them, a "bluebelle" was always the most timid, and almost worryingly placid. Always very easy to pick up with even one hand, it would not really squirm/jump. It would never run as fast as the rest when I brang them food. But still it was always capable, it jumped up into the riased coop and hopped onto the perch. It always managed to get a fair share of food etc. But today she died! It was in a quiet sheltered area near our house. No signs of predator or injury. Only recent ailments id noticed was a slight bit of "wheezing" this morning, and that the hen had much more runny droppings that the rest. The "wheezing" I describe, was the hen stretching its head / neck forwards and opening its mouth wide. A bit like a yawn, which it did several times in sucession. I watched it for a while but it seemed fine so I left. Then a couple hours later I hear it is dead! Does anyone have any idea what this could be? The people I bought the young hens from said they had two vaccinations. One was Mareks, I cannot remember the other. They also said they had been dewormed. I have not noticed any lice problems.