What breed is this

[tbone3636]

I just got these 5 chickens today, the guy I got the from thought they were meat chickens but did not know what breed. He said he thought they were 14 weeks old but these birds are huge prob 10 lbs already they are mostly white a couple have a few black spots. What breed do you think they are? He said his daughter got them from TSC as chicks

 

[Blackberry18]

Cornish Cross, the standard meat-bird. I got six from TSC my first time buying chickens. They're usually marketed at 8 weeks at least. Mine grew to be 20 pounds, maybe more, and lived one year.

 

[Michael OShay]

Cornish Cross, the standard meat-bird. I got six from TSC my first time buying chickens. They're usually marketed at 8 weeks at least. Mine grew to be 20 pounds, maybe more, and lived one year.

I agree. I would strongly suggest butchering them around 8 weeks. If you wait much longer than that they will begin to develop serious health problems due to their abnormal growth rates. The fact that Blackberry18 got one to live for a year is pretty amazing and very unlikely with any of your Cornish cross.