We have a Nankin hen, approximately 1 year, that has recently become lethargic. Her claws are soft and mottled and she is loosing wing feathers. While I have not been observing her feeding habits she is spending more time in the coop so I presume she is eating less. She does come down the ramp for meal leftovers. Several weeks ago our, autistic, grandson threw the hen in a shallow stream; seeing her distress took her out and tossed her down to surrounding rocks. (He thought she would fly, I think her wings were wet and so she simply fell.) Our guy reported himself immediately, upset at having hurt the chicken. I dried her in a towel and then with the blow dryer on low; I put her in the brooder for 24 hours. At the 24 hour mark she seemed restless, not warm and altogether back to normal. I returned her to the coop where she carried on as normal until our grandaughter noticed she was not coming out. I include the stream incident not being certain the current situation is related. This little bantam was Reserve Grandchampion at last years fair and special to our grandson, despite his decision to "wade with her". Any suggestions would be so much appreciated. Thank you.