Wow, wow, wow! Can you believe it, Ross? Did I tell you about variable down color? LOL. They are some beauties, aren't they?
First question- Are you sure the hen is pure for Dark Dusky? Are you sure she isn't Li/li? I guess how likely that is would depend on her background. Most Duskies and Khakis here in the US don't carry light phase. I'm not sure if the same applies there.
You got the typical mix of colors that have frustrated me to no end in some of my projects this year. Now you understand why I said next year I want to band and photograph every duckling from some of my test crosses. In theory (if you believe much of what has been written), every duckling should look like a Blue Fawn (similar to your first one). Well, you see how well that holds true. LOL.
You have some that look like Blue Fawns, some that basically look like Blue Trouts, and some that look like who knows what. You also clearly have some of the ducklings I have described before that have no dorsal spots and very enlarged eye stripes. It seems pretty obvious to me at this point that this is what results (or can result) from m+/m^d and that m^d is incompletely dominant, not recessive. My sport hens also looked very similar to yours other than obviously without the Blue dilution (the little "Blue Fawn" from that breeding to Pastel though was lighter than most of yours).
The big questions are how did the apparent light phase ducklings result and what color are the couple ducklings that are like the others without dorsal spots, but much lighter? One thing I will say about the Saxony color is that originally Dave wrote that Saxony was Bl/Bl, li/li, d/d rather than the currently accepted genotype. I am not sure the history of your Saxony, but perhaps that is what is going on? If so, I would obviously expect those to perhaps be hens. As far as the couple that look like Blue Trouts, I have seen time and time again that li^h partially restores some of the features of wild type, even in birds pure for Dusky. I would not be surprised if light phase does the same, hence the dorsal spots (of course, it could just be that frustrating "variation" in color that I have spoken about, LOL).
Gorgeous little ducklings, Ross! I can't wait to see how they turn out. In the meantime, I promise to get the hubby motivated to help take pictures of some of the apparent Duskies we have hatched this year. Moving the farm has just been such a major project and we're still not up there full time, so we're frequently not there on the same days. Additional pictures are coming one of these days though, I promise. Again, exciting project! I look forward to seeing your progress.
Editing to add- I will also say that it is entirely possibly that some of what has been written about light phase is also incorrect, which has occurred to me over and over again. If that is the case, it might be possible that the light phase, if that is what it is, did indeed just come from the Saxony rather than both parents. The question though would then become why wouldn't all of the ducklings show that then. Hmm... I don't know, I suspect it is that your hen is heterozygous for light phase.