I have an Easter Egger that stopped eating and drinking. She just walks around and ever so often she will stop and circle and bob her head up and down and puffs up. She will act like she wants to eat but lifts her head back up before she does. This has been going on all week. I have checked he crop every day. It hasn't felt to full or hard, but today there not much there. What could be going on with her? Very worried and would appreciate any help.