Thank you for raising your question/concern. I have a 2 year old SLW who I have noticed that her eyes look like they are sunken too, the lids are not puffy like I see your hens are; makes my Pepper, look like an old lady--. I am going to look back and see if I have any pictures of her to see if there really has been a remarkable change or not. She also just looks scruffy and I can tell that she starting to grow new feathers, maybe it's just part of HER molting process, more energy being put into getting back in to shape....well that was chicken ramble.