Do I need a roosting pole?

[aart]

...and read up on Space:
https://www.backyardchickens.com/a/how-much-room-do-chickens-need

 

[PastaChickenBoo]

I would recommend having three chickens. Chickens like other chickens. Once they are introduced correctly. If you have three and one dies unexpectedly you still have a pair and that works out well.

Yes! Chickens are social animals and like company! They can get depressed if they're alone.