I have 4 RIR hens and 2 BO' hens.
The BO's lay very early in the morning 6 days out of 7 (they have a 'rest' day one day per week.) One lays right on dawn, and the other is usually on the nest when I take them breakfast about 8am.
Of the 4 RIR's, two lay early in the day (both between 8am and 10am) and the other two lay in the afternoon, between 2pm and 4pm. They all take one day off per week to reset as well.
Technically, 'they' say that hens will lay an egg every 25-26 hours. This means that they 'should' lay at 8am one day, 9am the next, 10am the following day and so on, until they do a late afternoon lay and then reset for a day (have a day off.)
It never worked that way with my girls.
They seem to have nailed down their own schedules, and I can pretty much look at the clock at any time of day and know how many eggs are waiting for me. I'm not sure if this is usual, or if I have little weirdo chickens, lol.
They have been laying for about 3 months, and are now 8 months old, or thereabouts.
- Krista