What age do pullets first molt?

[joyous]

Hi, I know fall is the season for molting, but my pullets are all young! The oldest are three copper marans that I bought a month ago that were born in February. They are still shiny and bright although one hens comb is gotten pale and dry. I have 6 pullets that are about 3 months old: wyandotte, manx rumpie, polish, chantecler and a mystery hen. Will they molt this fall? Is the copper maran with the shriveled comb going to start molting? I also have 6-3month old guineas...will they molt this fall?

Thanks for all the help!