I would guess someone's personal project involving phoenix for Cluck-Cluck.
Her tail is exceptionally long, an uncommon trait and very easy to lose and not easy to regain if mixed. Perhaps a result of a cross then a couple generations backcrossed to phoenix or the generations of mixed birds were selected for long tails.
Cubalaya seems to be a popular guess but to me her body type is all wrong plus a way high percentage of cubalayas are wheaten. This bird is not wheaten- she's a red duckwing in color/pattern. Perhaps phoenix mixed with cubalaya for the pea comb contribution?
Summer is passable as a sex link- dual purpose type typical of them plus the dominant white also so very typical of the 'red sex link' group. but if she is also bantam, then she's simply a mix also....