White Leghorn or Cornish Rock?

[MRVWyo]

I accidentally put my white leghorn chicks in with the bunch of cornish rock chicks. And now I can't tell the difference. I want to separate them out, so any hints on what to look for to differentiate? Or do I need to wait until they grow a little more to see which ones are staying thinner and smaller? They are now about 11-12 days old or so. I picked them up on the 21st of April.

 

[sourland]

At this age the Cornish X should be noticeably fatter and larger than the leghorns.

 

[MRVWyo]

At this age the Cornish X should be noticeably fatter and larger than the leghorns.

Thank you. I'll watch them for awhile and see. I was thinking also that the breast would be huge on the Cornish already. True?

 

[TheOddOneOut]

Thank you. I'll watch them for awhile and see. I was thinking also that the breast would be huge on the Cornish already. True?

Compared to the Leghorns? Probably.

 

[sourland]

Thank you. I'll watch them for awhile and see. I was thinking also that the breast would be huge on the Cornish already. True?

Yes - the whole body will be more round.

 

[MRVWyo]

Thanks all! I picked out the 2 leghorns and they are now in with my flock of layer chicks.