When to combine new girls with existing flock

[wefroggy]

I currently have 25 chickens, 17 weeks old. Today I had an offer I couldn't pass up, 5 Araucauna hens, laying already, all for an incredible price. I really wanted more of these hens and here they were. I picked them up, they are all healthy looking, no scaly legs etc. I separated them in the house, but the poor girls had been completely free range, no hen house. They are going a bit crazy in the house. In addition to quarantine I want them to get used to laying in the house and coming back inside at night.
My chickens range during the day but are locked in at night. How long before I can integrate the 2 groups?
Suggestions on time? Method?
Help

 

[Me + Peeps]

keep them separated at least a month maybe more you don't want to kill your flock