Today is day 23 at 2:00, none of my BCM's have hatched. They are rocking, but no pips. This will be the second group that I have had to fail. 7 others in the same incubator hatched, they were Orps. I just wonder if BCM's are harder to hatch and the conditions have got to be perfect. All eggs went in together and temp and humidity was good. Do I intervene at this point? I dont want to lose the 2 that are rocking. Any advice?