Big white chickens - what breed?

[moparevers]

I got these 6 chickens on a trade. From all the pics I've seen, I think they are white rocks. But they are huge... kinda afraid they are a meat bird? All the prior owner knew is that they were laying hens. They are supposedly 3-4 months old, but are bigger than my 7 month old leghorns. I got a leg horn in one of the pictures... she has pale yellow/ white legs and a big comb.

 

[sourland]

They may be white rocks, but to me they look suspiciously like Cornish X meatbirds.

 

[enola]

X 2

 

[moparevers]

They have really short combs. I looked up cornish crosses and most that I saw had bigger combs... white rocks & chanetclers have short combs like these...

 

[sourland]

They have really short combs. I looked up cornish crosses and most that I saw had bigger combs... white rocks & chanetclers have short combs like these...

Look at the body type. Combs on these pullets will increase as they reach sexual maturity.