They all went from pink/dull red to bright pink almost over night. So when can I expect to get some eggs?
I got my chicks as day olds on May 22, 2009, got my first egg the day before Halloween.
You said you have a mix from 6 months to 18 months, If you recently got them and moved them to a new home, they may be stressed and not lay till' they feel safe.
You really can't go by the color of their combs, they lay when they want to, and not a moment before