Possible sun burned face?

[Sunny Chicks]

Hi everyone! I have 13 nine week old pullets, and they've all been out in the run alot, they don't get a ton of sun depending on where they are in the run. Anyway, two of them, a buff Orpington and a black star, have quite red faces. Pretty much the same color as their combs and wattles, but they're the only two that seem to have red faces. It's only around the outer edge of their face, too. What does it mean? Is it a sun burn? Or just a growing stage?
Thank you!

 

[ramirezframing]

might be a growing rooster starting to bud into man hood got pictures?

 

[Sunny Chicks]

Her face got really red, then went back to normal color.



This one's face is also more red than the others.