Awwwwwwww. I'm so glad it's doing well for you!
We have a similar situation. Ours also hatched on the 19th. I had gotten 2 from a breeder on the 20th along with 8 jumbo coturnix. One button didn't make it through the night, leaving just the one.
He jumped out of his box to be in with the Jumbo. I was worried about the size diff. and separated them, again, but he jumped out of his shoe box again, that was sitting within the brooder of Jumbos.
So we left him with them, and he's doing good! Looks funny next to the big babies, but happy.
Ours is also a cinnamon.
He is fast! And hubby is calling him Zippy! I wanted Cinnabutton..lol... We'll see what it ends up. LOL!
I am going to try and find him one of his own kind this weekend.
I will be looking forward to updated pics of your sweet baby!