I just noticed one of my chickens not moving. I picked her up and looked at the legs. I stretched them, to see how she would react and she didn't react to bad on it. I felt if leg was broken, but don't feel its broken. I put her on the ground and she sits down right away and supports with her wings. Anybody has any idea whats going on or had this before? Chicken is a black Bresse and about 5 months old. Thanks.