I have a small,varied, backyard flock of 10 hens. I have one (only) americauna, about 18 months old who was a good layer of pale blue eggs for about 6 months. One day, she just stopped. It has been about 8 months since I collected a blue egg. I supplement the light during the darkest months of winter and all the rest of the girls respond appropriately. Any suggestions for kick-starting her hormones and getting her back to work?