My mother in law found most of her chickens from a local facebook group. She wants help getting breeds or if they are mixed get some ideas!
#1 the white chicken with dark face
She is a Silkie-mix.
She cannot be a pure Silkie, because she does not have the silkie feathers. She is almost certainly part Silkie because of how many other features she has in common with Silkies (black skin & comb, general comb shape, crest, beard, feathered feet. I can't tell if she's got the extra toe or not.) I would guess Silkie father, other-breed mother, because of how the dark skin is inherited. Or she could be a multi-generation cross (Silkie-mix to another Silkie-mix could easily produce a chicken like her.)
Probably came from a mixing of breeds in someone's backyard flock.
#2 the redish orange chicken
Probably an Easter Egger.
If she lays blue or green eggs, definitely an Easter Egger. Probably comes from a hatchery, maybe by way of
Tractor Supply or a similar store, but could also come from breeding Easter Eggers to each other or to other breeds in a backyard flock.
#3 the black chicken suspected to be a silkie, but has some of the same iridescent coloring as her Ayam Cemani Roo (not from same breeder)
Silkie mix. Same notes/reasons as #1.
The different comb sizes on #1 and #2 are just caused by slightly different combinations of genes that control the size of the comb.
#4 Grey and black, I only have 1 picture because she is very shy and nervous
She has a rose comb, and is the color called "blue."
She is definitely a mix of some sort, probably hatched from someone's backyard flock and not bought from a hatchery or a store that orders hatchery chicks.
Her parents might be something like Wyandotte (any color) x Sapphire Gem. That would be one breed with a rose comb and one with blue coloring, both breeds being fairly common in backyard flocks. But there are many other combinations mixes that could also cause that set of traits.
We are going to be on the look out for egg colors vs hens, she has a variety of colors!
If any of them lay blue or green eggs, they could also be called Easter Eggers. It is quite possible to have a Silkie-mix that is also an Easter Egger, or a Wyandotte mix that is also an Easter Egger, etc.
#1 Silkie...looks like a rooster with that much comb. Does it crow?
#2 Easter Egger/Ameraucana mix. Nice hen. Should lay blue/green eggs.
#3 Silkie mix. Looks to be a hen.
#4 Could be a number of things but I'm thinking Blue Orpington, if it lays cream to light tan eggs. It *might* be a Blue Marans American style, without foot feathering, especially if it is laying darker brown/clay pot colored eggs. Nice hen.
My 2 cents.
I disagree about the breed of #1 (you missed the non-Silkie feathers). Apart from OP saying it's a hen, I'm going to point out that it has no male-specific feathering, and some hens can have large combs too (Extreme examples: Leghorns, Red Cap breed)
I also disagree about #4 (you missed the rose comb, so both of your suggestions have single combs.)