My chicken roosts are natural branches that I sanded away any sharp bark knots so no foot injuries. A 2 to 3 inch diameter branch works ideally. Leave bark on to provide good grip.I’ll be looking into different styles this weekend and hopefully have it done before the holidays.
I personally like it because it simulates a tree.
Chickens are birds last I checked
In previous times,, I used regular lumber boards. I then rolled onto wood, layers of newspaper to create a somewhat rounded shape. Stapled Indoor-outdoor carpet over the newspapers. This gave chickens a roost with traction so they would not get bumped off easily.