ref 75
genetics are alwasy complex, and even more so when trying to follw it as far as an explanation is concerend..
that said,
Im not sure exactly what you are trying to say james.
If the parents, even though fawena and blue, were the result opf cross color breeidngs in past lineage, they could easily pass on genes of other coat colors that could match up.
unless the only other explanation could be that the fawn was not a tru fawn, but a light red, and the blue wold have red or black lineage,this can make the pups results in red and blacks..
thats woud be my understanding, but i am open to further explanation from you.