I have two supposed-to-be araucanas. They look like a's, and I think they have started laying (they are in a coop with two other chickens of same age but different breeds, and I am getting 4-5 eggs per day, all cream to tan) but I see no blue or green eggs. Are they not araucanas? Do the eggs become green/blue when the hens are a bit older? is there something missing from the diet?