Do Barred Rock chicks grow fast?

[Joecola123]

Hi I have two 6 1/2 week old Barred rocks that I am planning to add to the flock of 15 week old cochins in a few weeks. I wanted to know if they grow faster then cochins?

 

[Mahonri]

I'd say they grow about the same, but I've seen some cochins that were getting huge at 3 months.

I wouldn't put them together until the younger ones are at least 16 weeks... otherwise they'll get beat up.