Hi all, I'm brand new to chickens. I just bought 4 week old silkie crosses (three showgirls, one frizzle), they're about 10 days old now. One of the showgirls is presenting with small nodules on its neck, they look like pimples with a red dot in the center of each bump. All the chicks are active and seem otherwise ok. What's the prognosis in chicks this young? Should I separate the one chick, or have the others likely caught it already too? The pic below looks very similar to my chick's neck. I can get some actual pictures in a bit!