We have a silver Wyandotte that had a pasty butt. So we caught her and had her upset down in my lap with her head laying over my knee not quite touching the floor. We were cleaning her vent and when we finished I brought her back up to let her loose and she was dead. My husband thought she might have passed out but we can't feel or see her breathing. Was she so stressed by this that she had a heart attack and died? Her comb looked red , her vent looked normal other than the build up of chick shit. Any ideas ?