@EggSighted4Life As far as I know - crested birds (Silkies and Polish) have vaulted skulls. This is what makes more of the "poof"(?) They have a hole in the skull as well which makes them much more susceptible to head trauma/brain injury than say an Orpington. Hope that helps.
Brown Egg...
Can you take a fresh sample of poop to your vet for a fecal float?
She does look unwell - you may want to place her where it's warm and provide her with her own food/water. Add some poultry vitamins to her water if you have them. See if she will eat for you after she is drinking. You can...