Mrs. AK-Bird-Brain :
The white crested black polish is a girl, the red is a boy, darn tootin'.
WW, I would give Quartz some plain organic yogurt, with a little oatbran or ground old-fashioned oatmeal stirred into it. If she's puking up whole corn, she's definitely blocked up. The yogurt, oats and maybe a little cod liver oil to make it into a loose slurry and let her eat that. It should lube, add some good bugs, and nourish all in one.
But not a lot... just a couple of tablespoons at a time, and mix it fresh. Trust me... you do NOT want to open up her crop if you don't have to.
That means my polish is probably a girl...I hope,,, I'll take pictures. I am presently almost out of avian I was going to reorder, but after hearing WWs problems I probably won't have much luck!
My Orphingtons a Tori's splashes, and they are getting big.