Can you post a picture of her? It would help to know if she is laying. Is the white material slightly yellow-colored or look like egg material? A new layer in her first year should not develop a pale comb, unless there could be a laying disorder, mite infestation, or some kind of intestinal infection, such as coccidiosis, enteritis, or worms. Can you feel inside her vent up to 2 inches for a stuck egg?
Can you get some droppings examined for coccidiosis and worms? If not, I would be tempted to go buy Corid to start in her water (and is safe for the whole flock,) and also treat her with a wormer such as Valbazen or SafeGuard Liquid Goat Wormer or horse paste. For now, I would use a few drops of Poultry NutriDrench or get some vitamins with electrolytes in her water. Egg, tuna, salmon, liver are all good to tempt eating, in small amounts along with her feed.