Oh good. After looking at the links Chicken Canoe posted I'm really glad he isn't a Cornish! I know they have their purpose but it just looks so painful to me!
It may well be a mix of something, but I'm curious as I'm finding out CC's don't live long.
The first pic was when he (now named Theo lol) was about 3 weeks. The second one is this week but it's harder to see - sorry. He's a lot bigger than my other three chicks, but they aren't all the same...