I have a chicken who eats like she's famished but doesn't seem to gain any weight... in fact, she feels like she's feather and bones. She has great energy though. Due to her feathers, you'd never know she's lacking in weight. I'm not certain it's from worms or parasites but I thought it wouldn't hurt to try that route. I'd like to do it naturally. If I mix some in their food, could this be all she needs?