there is this site whitehousequail.com where I found about heat treating the eggs Heat TreatmentAnother one of our quail raising techniques that sets us above the rest is called Heat Treatment. Heat treatment is a process which we can put eggs through to improve odds of hatching after they are shipped. The process is roughly: 1. Bring the eggs to incubation temperatre 2. Advance the embryos to a more hardy stage 3. Bring down to below room temperature so they are trapped in this stage of development.