I have a hen just under a year old. She was trying to eat a bark scorpion when it apparently stung her somewhere around her mouth and she shook her head and began scratching at her face. About 15 minutes has elapsed and she is lethargic and seems to be having problems breathing, stretching out her neck and gaping with her eyes closed. She goes back and forth between laying and standing. I have brought her inside where it is cool, is there anything else I can do for her? Can chickens have benadryl? How often are scorpion stings fatal? She is my 9 year old son's, would hate to lose her and it sucks to see her apparently suffering.