Breed IDs on the 10 week old broilers

This batch of broilers contained 5 Black Australorps and 25 "all heavy" breeds, plus 1 free "rare chick." I could identify most of the breeds but needed a few IDed over on Backyard Chickens. Here's what we have:

Barred Rock

Blue Cochin

Buff Orpington

Light Brahma

Partridge Rock

Rhode Island Red

Silver Laced Wyandotte

Speckled Sussex

White Rock

Either the Blue Cochin or the Partridge Rock are the "free rare chick." I'm going to trial both of them as well as one of the Black Australorps as a replacement rooster. All of the roosters I trialed out from the previous batch ended up being jerks to the hens and were culled. The old feral rooster is still doing a good job but has a nasty foot injury. It will be good to have a second boy ready to take over if needed.