The biggest one, Oreo, we think is an Austrolrop because her coloring is the same as those chicks. The ginger one, Talulah, is turning golden with reddish brown accents and one of the “twins”, identical ones, Jackie, is also growing reddish brown accents to her black and white feathers. The other “twin”, Midnight, is growing even more white feathers to her black ones.
The twins both have large white spots on their underbelly and have white spots under their beaks.