I have a 7 month old White Leghorn Pullet. She is purplish in the waddles and comb. She has been like this 10 days. Vet told us to buy oyster shells, and pebbles. That hasn't worked. We tried Garlic in the water, recommended in a vet book. She has a good appetite and drinks plenty of water. She is overweight, she has cleavage LOL! We feed Templeton Crumbles, and Farmers Best Scratch on a daily basis, with grass, hay, and bread. She is the only one that has this, the other leghorns, and Orpingtons are fine. She also hasn't started laying, and neither have the other leghorns, but the Orpingtons have, and the Orpingtons are a month younger. She has no mucus or discharge coming from her eyes, or nostrils. She's perfectly healthy expect for her discoloration on the face. Anyone have any suggestions? The chickens are also free ranged and are put up at night due to coyotes, foxes, and other vermin.