Crazy for Chickens!
Free Ranging
I've been looking around, and although I couldn't find the store you named, I may have found the breed. A lot of feed stores order from Privett Hatchery, and they have this bantam named Pyncheon Bantam. I found a website with a lot of pictures, and the chick pictures look similar to yours. Also, especially if it's a rooster, i would expect it to feather out just like yours, since the roosters are darker in color, and also have spots. Here's the website: https://www.feathersite.com/Poultry/CGP/Pyn/BRKPynch.html