Here are my guesses... (I think I see more than 12 chickens?)
Pic 1 - Is a Red Sexlink rooster, with his tail feathers pecked off?
Pic 2 - From top to bottom: Barred Rock or Barred Rock mix rooster, rooster from pic 1, Red Sexlink hen, Black Sexlink hen.
Pic 3 - Red bird is a Rhode Island Red rooster, black bird is a Black Australorp hen, red and white bird on the top left corner is a Red Sexlink, gold bird is to blurry to say.
Pic 4 - Top to bottom, left to right: Red Sexlink hen, Red Sexlink hen, mutt hen, Rhode Island Red hen, Barred Rock hen, Red Sexlink hen, Black Sexlink rooster, Red Sexlink hen, rooster from pic 1, rooster from pic 2, and white bird-? From the little I can see I'd say it's a rooster.
Pic 5 - Chicken closest to the cameraman is a Barred Rock hen. Chicken near the waterer is the rooster from pic 2. I can't see the other birds well enough to say.
BTW, ALL THE ONES I CALLED RED SEXLINK MAY BE MUTTS WITH RED SEXLINK IN THEM.