My son has a year old hen who has become lethargic. She is drinking,but not eating. Her abdominal area feels hard and she has matted feathers around her vent. She dscharged clear liquid while we were cleaning the vent area. She is currently in a cage by herself with plenty of food and water, a low roosting pearch, and a deep layer of fresh cut grass for bedding. Although she has been in the nesting box today, we are not sure if she actually laid an egg. Any advice on the best teeatment for her.