I have a year and a half barred rock who within the last day or so has refused to leave her nest. She will only drink water if I bring it to her in the nest. I can pat and hold this chicken which is very unusual for her. She is usually my most skiddish chicken. Whenever I take her out of the nest, she just runs back to the nest. When I pate her in the nest she makes a "purring" sound. She does not squawk at me Does anyone have thoughts or ideas?