I am wondering the exact same thing!!
On April 8, we bought 6 little yellow peepers from
TSC that were called "assorted pullets" although they all looked the same. Here is what they looked like then (forgive the red lighting, lol):
And here is one now:
Then, the following week,
TSC had a new shipment of several assorted breeds and we got 6 Red Star sex-linked chicks from the "assorted pullets" bin.
I was under the assumption the first set of chicks we bought were Leghorns, but now I'm starting to wonder if they could be white Plymouth Rocks. I would love for them to be Rocks (I'd be happy with Leghorns, too... but I just love the way Rock chickens look!)
Here's a few shots of the group today:
Anyway, I would also love to know a way to tell the difference between white Rock and white Leghorn chicks. In all the pictures I've seen, they look very similar!