Wait till they squat. I give it about 4 weeks max until they lay in my own experience. The whole pubic bone trick is..not as definitive for me as they squat was. I was out in the yard while the ladies were doin' their thing and i surprised an EE and she squatted and I previously haven't seen her do this and two weeks later she gave me a green tinted egg three days ago.
I have seen my BO once squat take almost a month! A WHOLE MONTH. I was losing it for the egg wait. The wattles and comb trick was just a "time to start egg watch" for me.
walk right to them pointing your finger and touch their head. when they squat , five - ten days.
20 weeks, open the nest box. I got my first egg at 19 weeks Christmas eve.
lol, winter? all ten of my buff-0, ISA, Barred RI were laying by February . 26 weeks.