How do I incorporate one single hen into an established flock?

[grnidone]

I have 14 chickens: 8 hens and 5 Roos. One is the head Roo and the others are babies. (Yes, I know the ratio is not good.)

I found one single hen on the side of the road. I know it is not ideal to try to incorporate one hen into the flock, but, I really don’t have an option.

After her quarantine, how do I incorporate her into the flock?

 

[MarkJr]

Add one from the flock to her to be a buddy. When they get along, start with see but no touch.

 

[Califas77]

I usually make a little fenced off area in the chicken coop area for the new hen(s) and put in there for a few days, then let them run around with the others in a large area...like in the yard, larger than their normal run area. If they are ok, I'll let them roost with the rest of the flock, but sometimes it takes a day or 2 longer to get them to be friendly. Also I talk to them introduce them, telling the older ones to be nice...lol

 

[aart]

Get rid of those 'extra' males...or all of them.

You may already know, but.....
Consider biological/medical quarantine:
BYC Medical Quarantine Article

This might help with your single integration:
https://www.backyardchickens.com/articles/introducing-a-single-hen-to-an-existing-flock.71997/