I LOVE this post! Great information!
I'm trying my hand at olive eggers too this year, since they're so sensational to the public. Ok, they're really pretty and I like them too.
In one pen I have a mature flock of CCL over cuckoo Marans and CL hens. I just hatched out my first CLxCM chicks from this (3) and I'm suspecting it's 2 cockerels and a pullet (of course).
I have another pen set up for a splash blue copper Marans rooster over cuckoos, blue copper Marans, CCL, and super blues egg layers. These are only biddies right now so it'll be about 8 months before I report progress.
I'll retain a few chicks of both sexes from each cross.
If I breed my CL over CM pullets/hens to CM rooster will this preserve the intensity of the brown wash? And save me from having to line breed?
I'm going to hang out here and see how these projects go!
Didn't get back to you on this question...sorry...got lost in the thread.
If you breed your Cuckoo Marans rooster over your CL/Cuckoo Marans mixes, you should retain the brown wash as long as that rooster has good genetics for it. You *should* also get a boost from whatever genes were passed down from the Marans mother...but there's no guarantees for that, as stated, as I seem to see about 50/50 of the brown pass down as there are so many genes (about 13) that have to line up and they have to all point to the darkest color tone.
Do be aware that breeding Cuckoo to Cuckoo you'll always get barring/cuckoo without any sex linking.
If you put a Blue Copper Marans rooster over your Cream Legbar hens, you will have sexlinked chicks as the males will be barred while the females will not. It works really well with my Barnevelder rooster over Cream Legbars. The boys look pretty much like a CL rooster while the girls have this gorgeous black base and gold penciling that is stunning. With the blue feathering, you get 50/50 blue or black in the chicks which won't distract from the sex linking.....just a thought.
There are many ways to get to olive. One is to use a good purebred rooster (2 blue genes) over really good dark layer hens (Marans, Penedescenca, Barnevelder, etc.) and set only those eggs that are the darkest. You know you will always get blue shells, but the olive will vary depending upon how much brown wash is passed down from mum.
That's why it is nice if you get a boost of brown from dad too, but it does put you into a waiting game as you wait for the pullets to grow up to see who got the blue shell gene (remember 50/50 from passing down from a hybrid).
To kick this up a notch, for fun and efficacy, I used my Barney over a Splash Marans to get dark layer (and check how well brown passes)...I kept the 2 grey hens....darker brown layers B/SpM...remember grey feathers.
I then put my Barney over Cream Legbar and get olive eggers that are black with gold pencilling and head tufts....olive egger (about middle range)...remember gold pencilled on black.
I then put Barney over my black Isbar-Marans olive egger (from a breeder eggs) and have gotten F2 olive eggers (light, medium, and dark olive), all black birds.
I now can look out at my yard and know exactly who is who and who lays what because of their feather colors.
I've painted myself literally into a black corner with the Olive eggers being black, which line I will keep.
But to add more variety and some different lines, I will use Barney over a Wheaten Marans (on wish list) to produce some olive eggers that will be wheaten and muffed.
You can really use the feather genetics to help you sort out your breedings as you diversify your lines. For me, it's fun and I don't have to leg band and worry about regularly checking them to make sure they aren't too tight.
So if you are planning on diversity in the flock...let the sex linking and feather base colors work to your advantage....at least the first generation...it gets a bit trickier using mixed breeds generations after that unless you've got base black (which tends to be dominant...I'll see what I get with F2 black oliver eggers) or dominant white (never use unless you want all white birds).
Just what I do.
LofMc