This is what you can get from all colors with either a blue drake or a blue drake split to chocolate.
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With the chocolate gene in either a hen or the drake or both, you have lot of possible duckling colors!
This is one of my lavender hens vs my lilac. Lilac almost looks buff, with a caramel tone.
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Here are mine the one on the left is the male and one on the right is the female what color possibilities come from these two? Don't know if that's consider a black drake or not has black gray and white and a green iridescent spot on neck