I am horrified what is going on!! Quail toes falling off or somthing

She is just laying down fluffed up looks to be really sick and possibly dying, i have the cage covered over with a blanket. Her male quail keeps crying lout loud this is so sad, the only other quail i have is 1 male 1 female pair and i have had them for 3 years they would not accept him into their cage if his female passed away. Everyone elses feet are fine i just had a look