Acually otter and self are both possible.
black - aaB-C-D-E-
agouti - A-B-C-D-E-
in this case the parents appear to be
black - aaB-C-DdE-
agouti - AatB-C-DdE-
Which makes everything possible. Agouti can carry otter(My Dillan who is black got pregnant by Keebler, who is agouti but has a silver martin father, and produced "at" baby), because agouti covers up all other "a" genes. I BELEIVE, but don't quote me, since the sire does not have a self gene that means all the non-otter/agouti babies carry otter?
I have not read on genetics in a while but I still retain a bit. I know mostly basic genetics on comman colors in the comman breeds, just what I have worked with really. What puzzles me is the lack of any agouti baby, seeing as agouti is dominate.
Pam would be the one to truely help, I think.