I'm concerned about one of girls. I noticed that their feed was not being eaten and I thought it be stale. I threw it away and bought new. I realized when I was putting it out that it was pellets not crumble. Now 2 days latter I realized they aren't eating it. I ground it up and refilled their feed. They free range during the day. One of them is acting very lethargic and not eating. I did she her drink some water. I'm assuming this has something to do with the food issue but who knows. I offered her mango which she usually loves and the ground feed. She wouldn't eat anything. Also she is not sleeping with the others now. What do you think I can do to help her?