I once used Echina on CRD chicken when I wasn't able to get medication. it was a minute dose and she did very well!
I wouldn't recommend anything with alcohol in it, but there is a rescue remedy (for shock) that is safe for new born human babies. the main ingredients is chamomile, cherry plum, clematis, impatiens, rock rose and star of bethlehem. If it were my chicken, I would give tiny doses and see what would happen.
PLEASE NOTE: I AM NO EXPERT
I have been a chicken owner for over 2 years now and I grew up around chickens. My grandmother never took a chicken to a vet and treated all ailments at home with homeopathic remedies.
I have successfully treated many ailments with home remedies and have only once required anti-biotics. I m yet to loose a chicken to illness.