Doesn't look too bad to me, some weight on the skirt will work. Diggers will come up to the barrier (wall/fence) and try and dig at the bottom of the barrier. Some old tires would work... you could even paint them up and put a bottom in and make a flower pot from them.
JT
What about making small tractors that you can connect together with a tunnel? A cattle panel would make a 50" x 8' tractor...
How uneven is your ground? Photos? How many chickens?
JT