Before you lay pavers...I’m actually digging now to lay 16 inch pavers around it.
An "apron" is hardware cloth or other stiff fence like material that is laid down on the ground around the perimeter of the run. (In case you didn't know that.) A predator that will dig its way in (like a raccoon) can't dig through the fencing, and gives up.
If you put the pavers there, a digging predator will just start digging at the edge of the pavers, or any other solid surface, and tunnel underneath.
Another way to do an apron is to dig way down, like 18-24" and put the hardware cloth vertically. That's way more work than laying it on the ground, obviously, so most people do it horizontally.