Sweet!!! Thanks everyone! I was afraid it was a Cornish or some sort of meat bird as she is sooooo much bigger than my other chicks from the same order.
I can't imagine a hatchery would ever mix Cornish into a production line. Leghorns, sure, but Cornish don't really have any qualities a hatchery would be looking for in a production like of birds.
Nice pea comb, means you have a decent chance of getting blue or green eggs.