My hen seems to be unwell. yesterday she wouldn't walk into her hen house, i had to put her in. she has been repeatedly going back to her laying spot so i thought she might be egg bound. she has been eating drinking and passing waste well so i've ruled that out. since then i've separated her from the flock and kept her warm, hydrated, and fed. she doesn't seem to be improving. however, she hasn't become worse. if there are any suggestions about what this could be and how i could treat her, i would appreciate it.