Thanks for the good info on the worms! Will just have to be patient, I guess. DH bought some dried mealworms for treats. Momma calls & the chicks come running. It is so cute! Of course the big girls want some too so I feed them away from the chicks so they don't steal all of them.
My 4 chicks are with the flock too. Everyone in my area said "Oh, you can't leave them in the coop! You'll have to bring them inside where it's warm & away from the others." They looked at me like I was crazy when I said "Nope, leaving them with their momma in the coop." Even hubby was leary of leaving them in the coop. Co-workers (who've had chickens for years) told him "you can't do that! They need to be kept at 95 degrees for a week .....blah...blah...blah." I researched this thread to death before I made the decision to let them stay put! The backup plan was to bring them into the garage, if necessary. So far it has not been necessary.
Originally I was going to section off an area in the main coop for them so everyone could meet each other. I did make a small area with a cardboard box & a hay bale just so Momma could keep the kids contained while she was waiting for the others to hatch. I was only worried about 1 of my hens hurting the chicks but she's been fine. Maybe Momma went all broody hen/Mama bear on the rest of the flock when I wasn't looking because no one messes with the chicks. Mom is fine with us picking them up but they don't like it. Even the rooster lets out a warning if I'm picking up a chick & it's peeping like crazy. I've tried to explain to them that I'm not hurting anyone just trying to check them over.

I do watch the big girls when I'm in the coop. They seem uninterested in the chicks. I say try it, keep an eye on them and have a back plan in place if necessary. Best wishes!