I have 8 hens, and the other day one of them (Jen)started limping. She has also started keeping to herself. Other than that she seems totally fine. She is alert, and eating and drinking. She also will sit a lot. She is an 18 month old Rhode island red. I inspected her feet and legs, but I found nothing. I suspect a strain, but I am not sure. I also gave her half a baby asprin and it seemed to help. How much asprin can I give a chicken? Any thoughts or suggestions are much appreciated! Thank you!!