We have 4 hens that are 10 months old. One hen tries but has never layed eggs to our knowledge. She has clear and white runny poo and her butt feathers always look messy. She is eating and drinking but seems to lack the energy the others have. Today I noticed she is waddling when she walks (like a baby with a wet diaper). Sorry, I am new at this and don't know the correct terms. We live in an urban area and don't have a vet available. Hope someone can give us advice.