I have a homemade incubator that I have been using for a few years now. My most recent hatch included a dozen brown eggs from possible mixed birds, a dozen EE eggs, and 4 RIR eggs that I put in for a friend after her flock was killed by a bobcat. Unfortunately only four of the EE eggs showed any type of development and a few of the brown eggs were also clear, but of the rest of the eggs I ended with 18 hatched. Every egg that showed development hatched. So can I count this as a 100% hatch rate? I hope so 'cause I am .