I set 23 on May 1st, due to hatch May 23rd. Mine include RIR's, Barred Plymouth Rocks, Buff Orphingtons, Easter Eggers, and Australorps. I have a smaller batch due to hatch on the 9th. I have 2 incubators, one that holds a higher humidity. I'll place the eggs due on the 9th in my "hatchabator" tomorrow. I am very addicted.