Its called welded wire, see the kit link below.

https://www.deerbusters.com/kits/enclosed-garden-fence-kits/7-5-h-garden-enclosure-kit-w-top-and-gate-30-x-30/

It seems like everything wants to eat them, sucks you lost some.

My plan is to let them roam in the 1/3 acre area during the day while being watched and then going back into the 30x30 foot enclosure and then into a shared chicken and duck house I have yet to build.

thanks for the tokens!