Dun shows with a single gene. It would have to be chocolate.
Dun works in the same way that blue does, black base color, blue is single dilute, splash is double dilute and in the dun gene with a black base color, dun is single dilute, khaki is double dilute.
Dominant white covers/changes the black feathers to white except for the few feathers that might show black specks. Breed the dominant white to a black or mostly black chicken.
If you don't have a solid black pretty much any color that has enough black in it to be covered will work as well...
The hen is hetero for dominant white and the silkie is recessive white. Hetero dominant white will statistically produce 50% dominant white and 50% whatever other colors are in the mix. The hen does not seem to carry recessive white therefore none of the chicks are solid white, but all of them...
Both of those pictures are excellent examples of e+ and wheaten being bred together for several generations.
I unwittingly did it in an attempt to isolate the e+ gene for a project I had, I also had a melanizer present, but was never able to completely identify it before I gave up on the project...
She appears to be at least hetero for wheaten. If the breeder says she's e+ then maybe she's simply hetero for e+ and wheaten. I imagine there might be a melanizer involved as well.
When e+ and wheaten are mixed together enough they can come out in a real mishmash of colors and even more so when...
Do you have any other chickens with multiple spurs? If so you could use that to determine at least one of the parents whether it's the hen or the rooster. If you don't have any multi-spur hens then it has to be a multi-spur rooster.
The lighter chick will probably feather out darker or lean toward being more black. If it's a cockerel it'll likely be darker than the normal Marans rooster, if it's a pullet it could be almost black.
Just recently we did a test hatch from a hen that had been away from a rooster for 18 days. The eggs gathered on day 18 and 19 of being away from the rooster both hatched. I knew that they can be fertile for awhile, but that surprised me a bit.
I have also noticed that the eggs from a clean hen...
Here is an example of dun chick down and what it matured too. It's just an example, not conclusive. This is not proof for or against what you are experiencing, just an example. The hen is reccessive white so no dominant white in the mix at all.