My Americanna did lay eggs, then stopped for about a month and then layed eggs half of which were soft and broken. Then she stopped and the she started again with the same soft shell problem. Now she has stopped for over one month. She is one year old and I think this may be it. I only have 3 birds so i am hesitant to get rid of her but I want some eggs. The other two birds are prolific. What to do?