I haven't been able to hatch but 3 SFH, and I have tried several times. In fact, shipped eggs don't work for me. Local eggs, though, do great for me (or did...I am having a little trouble right now because of the heater coming on and off twice a day in the house. We will see if any of what I started a couple weeks ago hatch). I think there may be issues depending on the routes the eggs take to arrive to you, and SFH could be a bit more difficult, like some other breeds, and if you have a "bad" route (horrible employees shaking boxes, X-rays, etc) maybe it really takes a toll on them. Just speculating, but I have found it frustrating myself...I have so many locally bred chickens, but I can't hatch the ones I actually want! lol