Let me tell you something about bull traps. The bull is a uniquely ...shall we say not so smart animal. It upchucks its food and re-chews the vomitus, because needs at least two tries to even get digestion right. Outwitting and trapping the male bovine is trivial, said food stock is sufficiently stupid to actually deliver itself to the slaughterhouses and other places of meat preparation under its own power [!].
Hence "beef on the hoof."
Traps, when required, are rudimentary devices. They have no moovin [hahahaha -ed.] parts at all. They are no more than narrow holes in the ground, into which the straying animal steps & gets trapped.
Imagine?

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTpFlvT3uGApmzboluLGewjill7W9M_Y-GgwlxQ_mOn6y2xDmq8

P.S. BFX come up with some fresh excuses yet?