So, my last two hatches I ran my own test out of curiosity with an auto sexing breed (CCL) with temperature. I had read that lower temps produce more pullets and higher temps produce more cockerels. Hatch 1: had 24 eggs set at 99.5; varying highest temp of 100.1. 14 hatched, 6 infertile, 4 'dead' eggs. 12 were pullets, 2 were cockerels. Hatch 2: had 24 eggs set at 100.8; varying highest temp of 101.3. 12 eggs hatched, 7 were infertile, 5 'dead' eggs. 11 were cockerels, 1 was a Pullet. Has anyone else conducted temperature experiments to see if it affects the outcome of sex? What were your findings?