The Marans club has an egg chart you can buy that's what we are talking about when we give #'s 4 is the lightest a Marans egg can be for the bird to be considered a Marans. My Marans lay very well until it gets hot here that is over 100 they lay just like my Delawares an egg every day taking a day off maybe every 10 days or so mine get broody so then you don't get eggs for a week or 2 if you can break them from broodiness. I've hatched out chicks as I was over run with eggs having hatched out all I really wanted so now I'm only getting a few eggs as 3 of my hens are raising chicks and I only have 2 other Black Copper hens. My Cuckoos were laying just like that for 8 months and they are doing a partial molt so from 5 hens I'm getting 2 to 4 eggs a day. Egg color is not great right now either the were laying 5/6's and now they are just 4's except for one Golden Cuckoo hen who lays a 7 her's are now 5's and from 4 hens I'm getting 2-3 a day with my dark girl laying everyday she's a keeper..... In my case Marans will drop off laying when there is big weather swings more than my Dels and they are broodier once it gets hot and says that way my egg production goes back up. Only hatch from a rooster that came from a good layer and only hatch from hens that lay well also to improve your production and mine all started to lay close to 5 months also 18 to 20 weeks.