Hello Song of Joy!,
I have found with my pullets/hens that 2 eggs a week is on the light side. Where as there is a variance with different lines, I should think you should at least see 3 eggs a week if not more from a pullet that age. I am not sure what you are referring to when you say "fairy egg", but as I said.. you should be seeing more than that. This is a bit of an odd time of year due to decreased sunlight hours, and if your coop doesn't have a ton of natural light, that could be a reason as well. If as we inch towards spring, and daylight increases, she doesn't improve with that, you might want to reconsider using her for a breeding program as this is an undesirable trait, unless you really like her, and then I guess you can take what ever you can get from her.
YOu bring up a very good point when it comes to the SFH. Diversity is of upmost importance with this breed due to the fact that we are at the mercy of a very small handful of resources to get fresh lines imported to the United States. I would not consider breeding two birds from the same source, especially if that source doesn't have several pens set up that have distinct diversity to be bred together. You very well may have two very closely bred birds, and that is never optimal for any breed. It sounds like your best bet would be to replace one of the birds, whichever you like best, the male or the female, but the pullet sounds like she all ready may have the poor laying quality to her. There are many breeders in your area, and I am sure you can find some great stock from a reputable breeder to increase your numbers.
MB - Thank you. This is really helpful advice regarding rate of lay, genetic diversity, and a breeding approach. It sounds like I have my work cut out for me . . . to increase the number and diversity of quality birds in my flock before setting out to breed them.
Edited by song of joy - 12/29/15 at 6:12pm