I was referring to the offspring.Are you saying the Goldne Comets are I/i+, or their chicks are I/i+?
Your modeling in the calculator works if the Golden Comet hen is pure I/I
But because Golden Comets are a hybrid, and the father is usually a Rhode Island Red (i+/i+), then I am modeling the Golden Comet as I/i+
If the Golden Comet hen is I/i+
And the Silver Laced Wyandotte rooster i+/i+
Then some chicks should be I/i+ and some chicks should be i+/i+
So some chicks will show black (i+/i+) and some chicks will show little to no black (I/i+)
So my point has nothing to do with Birchen, just with whether the chick can show black or not.
About half the chicks should look "silver laced" or "silver-something," while the other half should look all white. (Yes, allowing for red leakage in all of them, as you previously mentioned.)