I was right! They must not have been Cornish x!

[jaku]

Yeah, no way they were Cornish X's at that size, no matter what you could have done to them. McMurray once sent me a leghorn instead of a Cornish X, but it was just one bird in a whole order.

 

[Red&Yellow]

I just looked at McMurray, and they have something called 'Frying Pan Special', which are white Leghorn cockerels....Perhaps that is what OP got?

 

[uhuh555]

The best way to tell cornish x from any other look-a-likes is by the activity of the chicks. Leghorns love to dart about and scratch--cornish x love to rest, eat and drink--oh yah--poop too. All DP chicks love to scratch and run about, too. Quite simple.