Best way to transition?

[3KillerBs]

what does this mean?

When you're introducing new chickens into a flock it's necessary to introduce them slowly and give them time to get used to each other before allowing them to freely mingle.

https://www.backyardchickens.com/articles/introducing-new-chickens-using-the-“see-but-don’t-touch”-method.67839/

It helps avoid fighting and injuries.

 

[ugachickenmama]

new chickens into a flock

Ah, gothcha. That is why it made no sense to me . . . this is my first round and they have all been together from hatch day . . . I'll be putting them out all together - they will be getting used to the new environment and temps, not existing chickens! Ha.