Lost a Partridge Cochin yesterday. Actually, I just found the body yesterday, looks like it had been dead for at least a week or two. I had a coop pushed up against a wall, and it apparently got wedged behind the coop and couldn't get out. So many chickens running around, I never realized I was missing one.
There are many, many ways for chickens to die, the number 1 reason is predators, 2 is diseases or sicknesses, 3 is probably chickens killed by other chickens, and it looks like coop/run layout needs to be added to the list.
I have made my run about as predator proof as humanly possible. I am learning about diseases and treatments as fast as I can. I keep an eye out for any "personality clashes" and separate any chickens that can't get along, and have enough room for any chicken to escape from a bully.
Now, I guess I need to take a look at how the run is laid out, and eliminate any "squeeze" areas that a chicken couldn't escape from by itself.

