TIL: Fence top roller bars - do they keep chickens in?

[Mother of Chaos]

Hi all, today I learned about fencetop roller bars, gadgets that you mount above your fence to control cats, dogs, and general predators. The idea is that when they climb a fence, they generally grab the top, but if the top is a spinning bar, they lose traction.

Has anyone tried these for Escape Chickens? Our heritage breeds are pretty content to remain earth-bound, but we find the Easter Egger nonchalantly cruising around outside the 4’ poultry netting in the human areas. (Fortunately, she seems uninterested in hopping the 6’ wooden fence around the property. So far.)

Things we’ve tried:

• Floppy fence tops: we have Premier 1 No-Shock Chick Fence, which is 4’ high and quite floppy. After a few wobbly attempts at balancing, she now just casually clears it in one step. (We love the fencing, btw, because we frequently rearrange the chicken zones to let them obliterate new spots in the yard.)
• Floppy chicken wire atop the gates - same result as above.

I’m considering using a narrow-diameter PVC pipe (or metal conduit) inside a larger one, set 8-10” or so above the existing fence height.

Does anyone have chicken-related experience with these?

One of several DIY sites: https://yoursassyself.com/roll-bar-fence-diy-keep-your-pets-in-others-out/

 

[nuthatched]

At 4ft, she's likely not even touching the top of the fence very often, I'm not sure rollers would help

 

[Mother of Chaos]

At 4ft, she's likely not even touching the top of the fence very often, I'm not sure rollers would help

Right, I figured I would have to elevate the roller bar above it.

It's so maddening; she doesn't go anywhere, just a "grass is greener" thing, I guess. The others go bananas when they see her wandering around - squawk city!