09/20/2026
Inside a Breeder’s Mind
Sara Alva hatched this little guy from a set of eggs from my breeding program, and I think he gives us a really interesting opportunity to talk about leakage a little differently.
Yes, the copper coming through his breast is something we want to pay attention to in a Black Copper Marans male. But there is an important distinction here that is worth making.
The French standard states:
“poitrine noire ou légèrement tachée de roux”
Meaning the breast is black, or lightly marked/spotted with reddish-copper.
So a few copper feathers on the chest are not, by themselves, outside the French standard.
We’ve all seen some extra copper pop up from time to time, and if you haven’t, you may be busy fighting the opposite problem with overmelanized girls. Lol. Black Copper Marans really can be a balancing game.
But this particular expression is interesting.
His copper isn’t appearing as one or two random feathers. It is broad, bilateral and organized through the upper breast, while strong black pigmentation is still clearly present right alongside it.
Maybe there is nothing more here than an expression many of us have seen before.
But are we looking only at what we don’t want, or could the way that black and copper are expressing together tell us anything useful about what he carries and, more importantly, what he could pass on?
Could a bird like this actually be a tool we need in our breeding toolbox under the right circumstances?
A breeding toolbox isn’t made up only of birds that look perfect. Sometimes it is made up of birds carrying a particular strength or expression that, when used deliberately and paired correctly, can help move a population in the direction we need it to go.
Phenotype is what we can see. It is not a complete inventory of genotype.
That doesn’t mean we excuse a fault or automatically breed from a bird because we find the expression interesting. It means we observe. We let the bird mature. We look at the whole bird. And if there is enough reason to test him, the real information comes from what he produces.
Would he bring stronger, richer hackle copper forward in his daughters?
Would his sons inherit this same breast expression, or would they mature with the copper properly restricted? And is the expression we are seeing here, with black eumelanin and copper/red pheomelanin appearing together within the same feathers and in this particular organized pattern, telling us something about how that color is being expressed or restricted genetically?
That is the part I find so interesting. Not simply that copper is present, but how it is present.
Those are the kinds of questions that keep breeding fascinating to me.
Sometimes the bird standing in front of us is giving us an answer.
And sometimes he is giving us a question.
Continued in my pinned comment below…
