We have lost five so far but haven't noticed any PTSD. I had my chickens sleeping in the garage after the attacks, while I got the coop finished, so they got used to a specific plastic bin and the garage being their coop. What I did was leave the bin outside for a couple nights, and they would jump I the bin, which I would then move to the coop and lock them in. The I just left the bin in the coop and they started going in there. It was a training exercise for them, but they have it now. . Good luck, hope this helps!