I have five hens and one of mine seems to have recently become much smaller. Her crop always seems to be nearly empty and I don't see her in the yard eating much. When I offer her food individually, she eats like she hasn't eaten all day even though there is always food out and they are free range. How do I get her to eat more? All of the hens are about a year and a half. She has not been laying for over two months and about a month ago had a respiratory infection. She is also bullied by two of the other hens.