could very well be that the black line is good and clean and the blues have a touch in them.
The obvious leakage you mentioned is yes usually yellowish to orange in blue and can be anywhere. The rusty look is just a very faint mild leakage and usually only in the hackles and saddles.
It really doesn't matter line wise and all, it can pop up pretty much any time. Black hides so much that it's hard to know 100% or not what all is under it. Now, this isn't a cull worthy leakage in my book, just a very faint deal that males some times get. If you see it in a hen though, no I wouldn't use her for breeding.
And try a full body pics if you can for us to get an over all look at the bird, that would help, this may just be the color of the bird and not leakage. But usually if you get the slightly rusty blue it is . If on a black like that, it can still be hard to see. Kinda comes out just a rusty tinge to them as well. and isn't a solid colored feather. Hope that all made sense?
edit to add
white birds often get a similar leakage in the in the hackle and wing bow area. It's a dirty yellowish tint to the white feathers. Still white, just looks dirty sort of
The obvious leakage you mentioned is yes usually yellowish to orange in blue and can be anywhere. The rusty look is just a very faint mild leakage and usually only in the hackles and saddles.
It really doesn't matter line wise and all, it can pop up pretty much any time. Black hides so much that it's hard to know 100% or not what all is under it. Now, this isn't a cull worthy leakage in my book, just a very faint deal that males some times get. If you see it in a hen though, no I wouldn't use her for breeding.
And try a full body pics if you can for us to get an over all look at the bird, that would help, this may just be the color of the bird and not leakage. But usually if you get the slightly rusty blue it is . If on a black like that, it can still be hard to see. Kinda comes out just a rusty tinge to them as well. and isn't a solid colored feather. Hope that all made sense?
edit to add
white birds often get a similar leakage in the in the hackle and wing bow area. It's a dirty yellowish tint to the white feathers. Still white, just looks dirty sort of
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