Chicks with red down, who grow white flight feathers in their wings, may be Red Sexlink pullets. (Sometimes sold as ISA Brown, or Red Star, or Gold Comet, or various other names.) If they are, they will grow up to have lots of red feathers but some white accents, including a white tail.
There are a few other breeds that can have red down and grow white wing feathers, but Red Sexlinks are definitely the most common breed to do that.
There are a few other breeds that can have red down and grow white wing feathers, but Red Sexlinks are definitely the most common breed to do that.