If they were shipped eggs....that's pretty much standard, or at least from my experince with shipped eggs 50% is good, sometimes it's lower, other times I've had 100% hatch, although those times have been few and far between....everyone seems to fixate on "hatch rate", what you should be looking at is "fertility"....I don't care how careful you are in your incubation pratices, if the egg is not fertile, it ain't gonna hatch! Also, most peeps don't figure their "true" hatch rate correctly, in the first place.