its a preventative measure against forage soiling. At the mo all mine get their hay in litter trays, and with so many who all spend lots of time in their trays peeing and pooping, their's a lot of soilage. I change the most popular trays twice a day, the others once a day.
Haven't decided what exactly i'll use yet out of all the clever ideas, a combination i think. They will run from about an inch off the floor to whatever height they reach, and will be easily removable so I can clean around them. Some of my piggies are extremely flexible, but a few need everything in easy reach.
Was thinking some type of clip to attach them. Maybe wire ties on one side of the C and C racks, to act as a hinge, and clips on the other. Will post Pics then all is done.