I did not read all the posts. But I have to comment on this one'
You have a rusty slate tom! They are the most versatile Toms if you are breeding for colors. That have Bb Dd Rr genotypes. I have one and I use him a lot for non-APA varieties.
Here are the possibilities for what that little one is:
06.25 Female Blue Red Bronze
06.25 Male Blue Red Bronze
06.25 Female Bronze Semi-Color Semi-Gray
06.25 Male Bronze Semi-Color Semi-Gray
06.25 Female Red Bronze
06.25 Male Red Bronze
06.25 Female Red Slate Semi-Color Semi-Gray
06.25 Male Red Slate Semi-Color Semi-Gray
06.25 Female Rusty BlackColor Semi-Gray Semi-
06.25 Male Rusty BlackColor Semi-Gray Semi-
06.25 Female Rusty SlateColor Semi-Gray Semi-
06.25 Male Rusty SlateColor Semi-Gray Semi-
06.25 Female Tri-color Mottled Black
06.25 Male Tri-color Mottled Black
06.25 Female Tri-color Mottled Slate
06.25 Male Tri-color Mottled Slate