They are all Red Sex Link pullets. Red Sex Links are hybrids produced by crossing a red gene rooster (RIR, NHR, or Production Red) with a silver gene hen (WR, RIW, SLW, Delaware, Lt. Sussex, etc.). The resulting offspring can be sexed by color at hatching (male chicks are whitish, female chicks are reddish), and this color distinction remains with them as they mature (cockerels are white with some reddish feathers in the saddle, pullets are reddish with white underfluff and some white feathers in their tails like yours). Red Sex Links are marketed by hatcheries under a lot of different labels including Red Star, Gold Star, Gold Sex Link, Brown Sex Link, Cinnamon Queen, Bovans Brown, Golden Buff, Golden Comet, Hubbard Golden Comet, Isa Brown, Shaver Brown, Babcock Brown, Warrens, HyLines, Gold Lines, Lohmans, Lohmans Brown, Bovans Goldline, etc., but no matter which label they are marketed under, Red Sex Links are egg laying machines, outlaying either parent breed. It's one of the interesting quirks of hybridization.
