Australorp mixes and RIW?

[Kaymae1789]

I have 6 pullets that I purchased from TSC 8 weeks ago and I'm having a difficult time figuring out which breed they are. The closest I can come on the whites are Rhode Island White based on the comb size and color. They turned a little pink a few weeks ago so I don't think they'll go completely red. Then the black 3 have a bit of greenish blue on their tails so I believe they may be Australorp mixed with something. They have patches that turned brown around 4 weeks, then darkened again.

 

[Kaymae1789]

I have 6 pullets that I purchased from TSC 8 weeks ago and I'm having a difficult time figuring out which breed they are. The closest I can come on the whites are Rhode Island White based on the comb size and color. They turned a little pink a few weeks ago so I don't think they'll go completely red. Then the black 3 have a bit of greenish blue on their tails so I believe they may be Australorp mixed with something. They have patches that turned brown around 4 weeks, then darkened again.

I think whites could also be Leghorns, but I'm not sure when their combs are supposed to grow larger and turn red.