I am curious to know if you've noticed any differences between the Duckworth and GSBR strains... even this early on??
I've not seen Duckworth strain chicks...would appreciate some photos for comparison if you get a chance (having 4 brooders is most likely keeping you real, real busy!)
The biggest difference I have seen so far is the difference in color of the cockerels: The Duckworth ones seem to be darker. I will see about taking some photos if I have a chance tomorrow.