That's not a Rhode Island Red. Rhode Island Reds are a deep mahogany all the way through,they virtually don't have any white on them anywhere. That's a Red Sex-Link. Sex-Links are specially bred so the males look different than the females at birth.
You could check out my review of Sex-Links for more information here: http://www.backyardchickens.com/products/red-sex-link/reviews/7289
And also,this is not really the place to ask your breed question. Please ask it here,on the "What Breed Or Gender is This?" forum: http://www.backyardchickens.com/f/15/what-breed-or-gender-is-this
Hope this was helpful!
Piper
Crazy Clucker, I think you're correct! I believe the two unID'ed pullets are Red Sex Links. I have several very young black Sexlinks and the characteristics are simular. Thanks for your input.
A lot of people confuse Red Sex-Links with Rhode Island Reds,but they should not be confused. Sex-Links have chararistically white-striped hackles and white tail feathers,Rhode Island Reds shouldnot have any white feathers in their plumage if they are true to type. if your so called 'Rhode Island Reds' have any white on their plumage,they are definitely not Rhode Island Reds.
Piper