* Perhaps I misunderstood, some folks think that a trench is needed to insert the predator protection vertically rather than lay horizontally. My inelegant solution (look at those stylish weights!!) -- makes me sleep better at night. It's 2' HW cloth.
Improving it would use Earth Staples, or tent pegs or similar to prevent sliding away.



Just as a mention - in the UK they made Eglu's -- like a little dog house for a chicken with a welded-wire run attached. These were engineered with a flat flange at the bottom of the arched wire -- It's less than a foot.

It's difficult to see because the wire is coated in green.
For reference, I've had raccoon dig under the chain link, some long time ago -- and terrorize the Isbar flock that was in that pen, and kill a favorite hen. My soil is very sandy and it was a piece of cake for the raccoon.