I know this thread is a few months old...I am new to this site.
I just wanted to say...
Instead of a conduit idea for bars, you can also use thick white plastic pipe(plumbing section of Lowes/HomeDepot) built with a slip frame so you can actually slide up a section to get to the grain bucket not having to go in the stall.
For those of you with Tractor Supply Stores local...they make "livestock panels"...with various size openings...2"x4", 4"x 4", and some with graduated sizes of larger on top to smaller on bottom. They are very
strong in nature, 16 feet long and height vary from 36" - 48". Price is anywhere from $18.00 - $75.00 per panel.
I have seen the 4"x4" opening panels($18.00) used for horse stall wall tops for ventilation and "seeing but not touching" of another with great success.
Just a thought...