On Tue, 11 Dec 2012 09:23:46 -0600, "Abby"
wrote:

Hi and Happy Holidays,

What would take to build a fence that cows could not break through or jump
over? We have a recurring problem with a neighbor's cows breaking through
our fence. We are looking for an alternative to an electrified fence (I
posted a separate query about electrified fences the other day.) The
problem area is at most 25..30 feet but we might get by with a 10 foot
section. The fence is at the top of slope which makes it more difficult for
them to jump over it. We have seen them break through and there were more
than on animal pushing. We are in Costa Rica where during the upcoming dry
season the pool and irrigated plants will be irresistible.

Thanks,
Gary

You can buy corral fence that comes in sections, made of 2" pipe.

Or the coils of razor wire stacked.

Pic:

http://upload.wikimedia.org/wikipedia/commons/a/a7/Concertina_wire.png

BTW, Andy, did you ever finish those (20?) mahogany doors? How did
they turn out for you?