I don't think I saw it but the ones have have been forced into free range by placing the water in a different place daily and spreading the food around the area.
I'm not sure what actual breed they are. They are steggles proprietary meat birds.
Brother collected a box of 5 dozen back in May or June some time and we have been slow growing them. The birds raised to instructions from that others had were killed about 4 weeks ago and this lot are about 70% of that size.
We have just over half the birds left I think as serveral of them have dropped dead from a lot of reasons.
Mostly lack of chicken intelligence and overcrowding I think. They are far far less intelligent than any of the heratage or random xbreed I have dealt with.
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I didn't realise you weren't looking at breeding them.
You could look at brahmas if you want to increase size. They used to be the US meat breed until about 1950 so they have the right characteristics for weight. But how big are your frizzles? I'll post a couple of pics of mine.