I set 4 from my ladies just to test the incubator. It's a mixed flock, but I know the 1 egg for sure is from our buff orpington roo and our amber hybrid hen. The other 3 could be from amber hybrids, a buff orpington hen, barred rocks or red sex links, all w/ our buff orpington roo. We have a few more hens than the "NORMAL" rooster can cover, but he takes that personally and decides to prove to us how many hens he actually can cover on his own for fear of us getting another rooster lol. This is just for fun to see how we do at hatching and since this is our brand new incubator. I have checked their fertility in the past and had good results, so we shall see what happens! Regardless it will be a fun learning experience for me, my husband and our daughter! If this goes well I have a lady asking me to set around 50 barred rocks for her!! Then I want to do an Easter hatch for some friends.....I can see this becoming addicting in a hurry!