New chicken to befriend lonely hen

[Gailze]

We recently lost 2/3 of our pet chickens to predators. :-(
So after a week of watching our one remaining hen mope about, we shored up the fence and got a young hen, about 5 months old. Our original girl is about 1.5 years. So they pretty much have to sleep together because it's a small set-up here. So far it has NOT been harmonious and the poor kid is getting chased around like crazy by our hen. It's too cold right now to keep the new kid in a separate enclosure.
I am a novice chicken mom, and want everybody to get along! How can I help ease the transition?
Thanks

 

[familyfarm1]

Here is an article that tells you what to do: https://www.backyardchickens.com/a/adding-to-your-flock