Between the option of leghorn and oegb, I would say it is an oegb. As already said, leghorns have white earlobes and this little guy clearly has red earlobes.
I looked back at the hatchery and they also have white Japanese bantams. Could he be that or is he probably a white oeg? I can take a better picture of his tail if you want. It comes up in what I once heard called a "Squirrel Tail". With the one tall long sickle and fan looking tail coverts.