our ameraucana stopped laying during the winter and has not yet started again. she is only a year old. all the others are laying. she is behaving normally, eating, drinking, scratching. she is more timid than the rest and was the primary feather picker over the winter (even though we tried everything in the book to stop it). she likes to eat the feathers. maybe a nutritional deficiency? we give them oyster shells. any ideas? thanks!