my favorite chicken looks sick. when i went out to check on them this morning then all came running out except her she was just standing in the corner. i went to check on them this after noon she was inside just standing there. then about 20 minutes ago i went to let them out and free range she didnt come so i picked her up and put her outside but she didnt even scratch. what do you think is wrong? the only difference i see in her besides just standing there is that she look like she is puffed out