A navy man once told me they would keep them on the ship for months at 50 deg.
I have also been told to always store them point down to keep them fresh.
I found this article with an experiment that was done. Their conclusion was unwashed, fertile eggs with intact bloom coating could last up to seven months when kept between 30-40*F (refrigerated.). I don't think there would be a big difference between fertile and non-fertile eggs. I think the important part is keeping the bloom to prevent bacteria from infiltrating, thus preventing the spoiling of the egg.
Can I get some help from someone with careless neighbours who own dogs.
