I am with the rest . 0 to 50. I had a lot of zero last year just starting out. I built bators using water heater thermostats. I had good tenps, but still had lot of problesm, I did hatch chicks, but I also had many. many clear eggs. I think some were not fertile , most wer scrambled. But I kept at it. The closer the eggs were, the better they hatched. Packing is everything. Eggs shipped wrapped in napkins, or such and placed in cartons had a 0 percent hatch rate.. and these were the ones that would be broken. 20 dozen total. Bubble wrapped and foam shippers are the onely way to pack. I do have some very nice birds now and still buy a few. I alos set in incubtors that will hold temp, and use a sportsman hatcher for lockdown and hatchinh. I may set my eggs in there the 1 st three days if ny bators are full. The sprotamsn was the best 100.00 I spent.