But at end it shows this trap will work tigers too, so it is a must do set up for all the mountain lions we have in TX and especially Grapevine/Southlake with fresh sightings! And we have plenty of tires and old fans in the bar ditches around to build multiple traps.
"the sow or other hogs will flip that tire off of the trap"
Make the hole deeper!
How about a large diameter post hole auger on a tractor? Then shoot it in the hole and use a big fishing gaff to get it out.
Had a friend that 40 years ago used to trap quail by burying a tall coffee can to its rim and baiting it with grain. They'd hop in the can for the grain but couldn't open their wings to fly out. He had many such ways to feed himself (until the Game Warden caught him).