I have a young Sussex rooster who has no power nor strength in his right leg and foot. I don't know what happened to him as there is no obvious sign of any cut or injury. He is holding his leg up of the ground and unable to put any weight on it. I have looked at the foot and the toes seem weak/ limp but there is no sign of any cut or infection anywhere. He is managing to balance himself using his wing and I have put him in a little house on his own to make sure he is not getting bullied by the others. Does anyone know or have any suggestion as to what may be wrong with his foot?