Mystery birds and cochin bantams

[Wxguru]

3 weeks ago bought 3 heavies and 3...what I think are bantam cochins.
The 3 heavies were yellow...but are feathering now and I can't tell what they might be. Skin is pink right now with yellow legs. Here are some pics...would love help if you know the breed an/or if you can tell if maybe a boy (they were straight run). I realize sec may take awhile to figure out! I have australorps and orpingtons now...
Heavy #1

Heavy #2

Heavy #3 feathering faster than other 2

And the possible cochin bantams...one possibly a fizzle cochin bantam
Bandit...our one winged bantam (partridge cochin?)

Smallest bantam (unsure of cochin type) we have named "Itty bitty":

And Ren, our last bantam cochin (mottled cochin?):

2 of the heavies have been challenging each other for a week....jumping at each other and neck to neck stuff...but my orpington hens did that at a few weeks old...so wondering if it is pecking order or rooster behavior.

Thanks for any help!!

 

[donrae]

Your heavies look like Orpington cockerels to me.

and three bantam cochins....a partridge, a dark blue or black, and a light blue or possibly very dark splash.

 

[drumstick diva]

x 2 very nice birds

 

[Gray Farms]

x3

 

[TheKindaFarmGal]

x4

 

[BantamFan4Life]

Your heavies look like Orpington cockerels to me.

and three bantam cochins....a partridge, a dark blue or black, and a light blue or possibly very dark splash.

x5