My girls lay one egg a day but not every day if she is broody you need to get her off the nest and separate her from the flock for a few days. That usually works on my broody buff rock
I kept my pullets in a separate encloser for a while and slowly introduced them in with the big gals out in the yard until they were ready to eat layer feed they were separate at first than over time they became a flock.
The bird is about four months and the comb has been like that for a few weeks since she began laying we have had her since she was two weeks.we have 12 chickens before our flock one being a rooster.
The Delaware is not 4 years old and has been in my flock for over a year and has never layed, all the other birds lay when she does lay she lays under a tree.