Pink and Marquisella, re: Blue Marans
Peachick has solid blue Marans doesn't she? Though I think hers are clean shanked. Here's an old egg sale post with
pics
There are two things that can cause color to bleed through or copper to show up on blues.
One is that they are genetically BCM, or Red Birchen and are supposed to show color in their hackle if they are not overmelanized. There are tons of almost solid black BCM hens out there, but no one's trying to breed solid black marans (hardly anyone), so these usually just go in the laying pen, or get matched up with Roos with lots of copper. But the BLUE version of these very same hens are very easily confused as genetically solid blue Extended Black based hens. And since more folks are interested in solid blue marans, these hens are used for that purpose, to produce more solid blue marans. These will never produce genetically pure Blue Marans that breed true.
The second problem is that a pure blue Extended Black based blue Marans should be Silver based. S/S for roosters, S/- for hens. Even if someone has a pure solid blue rooster who is E/E S/S, if any of the above mentioned ER based hens that don't show copper are bred to this rooster, all of the rooster offspring from this breeding will now carry gold from the hidden BCM genes. That is how you end up with "dirty" blue roosters, even from parents that appear solid blue. Since Extended Black is dominant, it's almost impossible to know if your blues are carrying ER or gold. A correct hen that is EE based is almost impossible to test to see if she carries copper. Maybe test bred with dominant white the gold would bleed through in the roos if she's carrying it. A test breeding with a plain BCM rooster would show if she carries ER, any ER offspring would be an indicator that she carries ER.
I personally think that most of the gene pool for BBS and Blue Copper/Splash Copper is completely mixed up at this point in their development. I think Peachick's line is pure, but not feather shanked.
Does anyone know of a Marans breeder who has a quality line of feather shanked Extended Black solid BLACK Marans? I think I've seen only one or two in the hundreds of posts on this thread. So if blacks are so rare, then where are the real blues coming from? Real blues meaning not undercoppered blue copper marans.
If I lived there, I'd match Peachick's blues with Don's whites. I think you'd get good dark egg laying pure blue feather shanked Marans, as well as some good solid blacks. Though if Don's whites carry barring it won't work... you'd just get blue cuckoos.