My 5 year old Buff Orpington, Henrietta, is exhibiting signs of shock with no sign of external injury. I found her sitting in the corner of the paddock last night when I went to put the chickens in for the night. Her comb was pale, she was breathing through her mouth and her feet were cold. She seemed unable to walk although she could stand. Her heartbeat was rapid. Eyes dilated. She seemed stunned. Her poop was runny with white looking mucus and some pellet like solids. I dosed her with nutridrench and put her in a crate with some water in the basement. She drank a little water, but would not eat even mealworms. I had added electrolytes to the water. She has lived through the night. This morning she drank a lot more water but still is not eating. She is standing but not walking around. I called our vet who sees my chickens but she is not coming in today. Previously she has been very active and lively so much so that I remarked on how unusually good she looked. This is very sudden. She does not exhibit symptoms of being egg bound. Her abdomen does not seem squishy, although her crop feels squishy. She does not have a bad odor from her mouth though. Could she have eaten something poisonous? I can find no evidence of that in the paddock. Could she have been stung by a bee? Has anyone had that happen? I am not sure how to further care for her. Is she dying? I would appreciate any advice.