Read this before you argue with it

This tool covers six genes that sort cleanly and predictably in silkies: blue, lavender, mottling, dominant white, chocolate, and recessive white. The percentages it gives you for those genes are real Mendelian odds, not estimates.

It does not predict partridge, buff, gray, or the other pattern colors, and the reason is worth understanding. Silkies are not built on extended black. Most silkies, including the black ones, sit on the brown base allele known as eb, which is the same base partridge sits on.

What makes a black silkie black is not the base. It is a stack of melanizers layered on top of that base, pushing pigment across the whole bird. That is also why an older black rooster often shows gold or brassy leakage through the hackles: the base underneath was never black to begin with, and the melanizers do not always hold it down forever.

Melanizers do not sort in clean quarters the way the genes above do. Two black birds can carry different melanizer loads and throw chicks anywhere along a range. That is why this tool will not hand you a partridge or buff percentage, and why anyone who does is guessing.

Recessive white hides everything. A white bird is genetically some other color with the pigment switched off, so if you do not know what is underneath, neither does this tool. It will say so rather than invent a number.

Percentages are odds across an infinite hatch, not a promise about your next eighteen eggs. Real hatches ignore probability all the time. Nothing here accounts for lethal gene combinations, fertility, or the modifiers every line carries differently. This is a planning aid and a conversation starter. It is not a guarantee, and it is not a substitute for knowing your own birds.