That's about the only thing that fence would protect: the bit of real estate just opposite it. Since it's not that long, they'd learn soon enough to just go down a ways and walk across. If that fence was 300 miles long, walking around it would be harder and it'd be child's play to breech. ANY fence, unless they have lookouts every quarter mile or so, is going to be breeched, given the kind of motivation involved. These people are risking their lives in the desert heat and the Coyotes are making, for them, serious bank, they know how to use ladders, ropes, and even to insulate from electricity.

What fence like that has worked in history?

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Te futueo et caballum tuum

1986 300SDL, 362K
1984 300D, 138K