We've only domestic cats and foxes (occasional rats depending on our lovely 'hygenic' neighbours - don't start me off on that subject !) to deal with as in the UK.
First run was 'custom-built' wooden one, all around the edge I loosely laid 450mm square slabs, also meant we could walk the whole perimeter even in winter, then just under the edge of those I slotted 18ins to 2ft width chicken wire strip all around, either buried under 1ins of soil or lots of bark chippings so was instantly easy to see if anything had been digging - not to mention the chippings really annoy anything digging as they don't stay put - if you've tried planting in a flower bed covered in chippings you'll understand lol.
New run (3 days old) is a larger galvanised steel one with a chicken-wire skirt so only time will tell.................will keep you informed !