I know this is an old thread, but my Ancona has not laid an egg for four months and judging by the color of her crown, she is calcium deficient. Also, she pecks the ends of other eggs. She doesn't touch the free oyster shell and is now not excited about eating anything other than greens. I had read but didn't offer the pulverized egg shells into my girls' diet, but I am now going to include it. I don't know what else to do.....
What do you mean by the color of her crown (like what's the crown, and what color is it when you can tell she is deficient)?
I understand Calcium Gluconate 23% is an alternative for treating calcium deficiency. I have been using it to help one of my runners who seems to be having trouble laying eggs (she has just come into laying age, and I'm really hoping that it's not an oviduct problem
