I started with 2 bantams approx 2r weeks old and non layers. This morning I wne tto the coup and unexpectedly found one had died. I am really not sure why. No predictors, no illness no symptoms. I am confused. Obviously this has left my chicken on her own. I worried she will get lonely. What is the best way to introduce a new chicken to the coup. Could it be possible there was something underlying when I got the chicken in June due to them not laying and the lady not vaccinating them? Does anybody have any advice please