This afternoon my mother informed me my chicken was limping and the other two she was raised with are chasin her off and pecking at her. When I went out to check she was far from the others hiding and was limping. When I picked her up and was checking out her left foot she was making croaking noises like a frog. I don't know what to do. Help??? She's is around a year old. She is the one behind the two closest to my ducks.