Nice!
Pics?
Where in this world are you located?
Climate, and time of year, is almost always a factor.
Please add your general geographical location to your profile.
It's easy to do, and then it's always there!
Hope that green house is predator proof and not an oven in the sun.
I like to integrate chicks young:
https://www.backyardchickens.com/articles/integrating-new-birds-at-4-weeks-old.72603/
But you still need to pay attention to the.....
Integration Basics:
It's all about territory and...