Help i.d. my 6 wk. unknown chickens, my silkie, and possibly NH Red?

[Maureen&chickens]

Okay. I have 4 chickens. Two that are 15 weeks old and 2 that are about 6 weeks. This is my first time with chickens and I have no idea what breeds/genders they are. I tried to take the pictures following the guidelines but it's hard to get them to stand still! Any help you can offer is greatly appreciated!

The first of the older two is Lulu. I'm guessing NH Red? Hopefully hen?:




The second oldest is Nifty. Through looking at pictures of breeds I'm pretty sure she's a Silkie:





Then there are the younger two who I thought were the same but now look nothing alike; one has feathered feet and the other doesn't. Cora (or Reggie?)





And finally Tiny:





Any feedback on breed and gender is greatly appreciated!

 

[damarisgw]

All look like roos Idk much about silkies though

 

[Amy's Animals]

All cockerels but the silkie, I think thats a pullet. Idk about the breeds, the first one maybe rhode island red or new hampshire red. I suggest putting larger pictures up so we can have a better look

 

[Maureen&chickens]

The pictures get bigger if you click on them. Are they REALLY all cockerels but the Silkie?! What am I going to do with 3 roosters?!

 

[Amy's Animals]

I'm sorry, but it appears that they are all cockerels, and we're not even sure about the silkie.

Did you buy them as pullets or straight run?

 

[Amy's Animals]

I think the bottom two might be Sebright mixes, how big are they?