I like to feed a flock raiser/grower/finisher 20% protein crumble to all ages and genders, as non-layers(chicks, males and molting birds) do not need the extra calcium that is in layer feed and chicks and molters can use the extra protein. Makes life much simpler to store and distribute one type...
Escapes look great!
Shade is the most important..and lots of cool water.....misting is great in a dry climate.
I dump piles of ice cubes on the ground in the shade and in a large shallow pan.
The worst bully is probably low bird of the bigs pecking order.....
...they seem to be the ones who either love finally having someone of lower status to pick on,
or they are concerned about being passed over again in the pecking order.
I would not separate her, that just sets you up for...