Thanks everyone. Will update in a few days.
This is our first foray into chickens.....So glad to have found this community to share information and ask novice questions.
We are glad you're here!
Oh boy, I think none of us every stop learning. Chickens are fascinating to me, there's so many wonderful folks here on BYC that are willing to help and share their experiences.
I don't think I ever gotten over chick jitters - I watch them like crazy and evaluate them all the time - looking at poop, toes, eyes, etc. and behavior. Behavior a lot of times is key with chickens. Observing your flock and taking note of each one how they "normally" act sometimes will help clue you in when something is going wrong. Chickens are very good at hiding illness, so you may not notice immediately.
Here's an example: I have a White Plymouth Rock. Every afternoon after she gets a treat, she goes to roost. Now. It's not time to go to roost yet, but roost she does! Give her about 20minutes and she jumps down and comes out. She has done this for several years, so this behavior is "normal" for her. Interestingly, when she takes to the roost in the afternoon, it's not her nighttime spot - she's not head hen - I've watched her on camera for years doing this and she gets next to the window looking out the back - it's almost like she's had her afternoon snack and is taking a break to look out the window

Afterward, she comes out, eats/drinks and scratches around with the others until it's officially roosting time.
NOW - if any other bird I have suddenly went to roost like that, then I would watch them close for a little while - see what happens. If they don't come out, then I go get them and check them over. Knowing your individual birds' habits comes in handy.
Keep us posted on the chick - I'm interested to see what the comb looks like in a few days!