Recessive red is epistatic to Spread.
Spread is not sex-linked so a hen may be heterozygous for it. Spread is on a totally different chromosome than that and a hen has two sides to that as she does to all others except the sex chromosome. When you add other modifiers to spread, the lid is off and you can get some of the most beautiful expressions of color available in pigeons. See the Spread rubella bird above or the Lavender Lahore below. Spread milky lahore Punnett Squares list the cock pigeon's genetic contribution down the left side and the hen pigeon's across the top.