I would line the cage with newspaper or wood shavings then look at each quail separately to decide the rate of survival.
they may come right once comfortable and fed , cleaned up if necessary.
they look as though they have lived in very cramped conditions.
as an animal lover I can’t cull a bird unless it is absolutely a lost cause for the bird.
look at their eyes and nose for discharge.
they might be fine with a little care.
looks like they have been pecking each other.
good luck.
