We lost our 18 week old Dominique last night with no clue as to how. All 5 were safe in the coop/run no preditors, they all got along great. There was a little blood near her mouth and her neck seemed to be in an odd angle... Could she have fallen and twisted it? Could an eaten spider cause this? Should I be worried about our other 4 chickens? Our chickens are our pets so we are shaken.