I just went down this morning to open the coop for my 4 girls and noticed that one of our hens didn't come straight out, Then when she did she was all stumbly and fell over. She sat for about a minute then clumsily got to her feet but now she is walking really slow and her wings are droopy. Usually when I walk up to her she runs away but today she didn't even move I could just pick her up. Does anyone know what could be wrong with her? Is she egg bound? I felt the vent but I don't know what i'm feeling for.