I used the early ones when they first came out. Small section of round tubing about 4” cut at 45 degrees on both ends. A nut welded in the middle to connect to a cable. I used 1/8” cable on mine. Never had one pulled by any animal and I caught a lot of coyotes on them. I don’t think a butcher size Hereford could pull one out. Most of my sets I could drive to so I used the truck to pull them. There’s a fair number of them still in the ground in Eastern Washington. Sometimes the cable would break before the anchor pulled.
So no. Neither a bobcat or coyote is going to pull one out.
