Are these Red Stars, Buff Orpingtons or Rhode Island Reds? Or a mix?

[HardinMiniFarm]

I recently bought 6 chicks from TSC. They are about three weeks old right now, and I'm just trying to figure out what breed they are. They were labeled at "assorted pullets" and stated that they were sexed, but the lady there said they don't actually sex them anymore. I know I will probably have to wait to see if I have any roos... I can't keep any... but I was just curious of the breed. The pics are from a couple days old and then 3 weeks and a few days old. & The red towel is just temporary while we were setting up their new home!! =)

 

[Domestic_goddess]

They look like red stars to me, Roos will stand out and have alot more white on them then the pullets.

 

[Queen of the chickens]

I don't know about red stars, but they are not RIR or Buff Orp. What about those Tetra-tints that TSC sells?

 

[HardinMiniFarm]

Everything I can find says the chicks should have been yellow and that they will be white, possibly with brown spots if they were the Tetra-tints. My chicks were yellow with reddish stripes and reddish heads. Now that they have some feathers they are looking much more red than white (one is more white than the others.. and a much faster grower but I think he just might be a roo..) Thanks for the help!