Curious cause another lady has Mille de fleur Cochin. Do those breed true if I had a rooster and hens?
In that you should get a bird with red black and white somewhere on its body, yes. But the pattern and colors aren't solidified like they are in actual Mille fleur breeds
Agreed. Mille Fleur Cochins are still very much a work in progress, so when breeding them you'll often get birds with red, white, and black on them in different proportions instead of neat patterning like in Mille Fleur d'Uccles. They're pretty birds regardless, but not very consistent in coloring yet.