I would separate out the rooster.
Any chance you have a predator lurking about that could be attacking the hens? Just asking - the peck marks on the white hen do look like it's from a beak, but you just never know.
For both hens, I'd work on hydration. Electrolytes or sugar water - get them drinking first, then offer wet mushy feed. As mentioned previously, chick starter or your gamebird feed are fine to give for extra protein.
Now, look at the feed that the hens have been eating - is the feed fresh and not molded. Could they have gotten into anything rancid/rotten? (compost?)
While the white hen does have peck marks, her curling over the head is still concerning. I've had hens beaten by roosters and usually they have suffered much worse and bloody injuries, ripping of the skin, but if it's really hot where you are her stance could be heat exhaustion.
Check the red one's crop to see if it's emptying overnight. The crop is on the right side of the breast. You should feel food/water in it when she's been eating/drinking. Take out food/water overnight while she's sleeping and then feel her crop to see if it's empty/flat in the morning before she eats/drinks. If it's not, then work on hydration, give her 1 tsp coconut oil twice tomorrow, then re-check, if it still doesn't empty, let us know.
If possible, get a photos of both of their poops/overnight droppings.
I'm very sorry that they are both not doing well.