Farm Animal Conundrum

[Tartar Horde]

I think we sometimes underestimate animals, especially domesticated ones as we are so used to them being, well, domesticated. The reason cattle and the like stay within their paddocks etc is not because of the barbed wire, but because they are used to being fed and looked after, it's a quid pro quo arrangement. If they stop being fed that barbed wire will not stop a couple of ton of Bull or Cow, and their survival instinct will take over, they will escape and risk death in the attempt rather than stay and starve, as all animals would.
I'm going to throw a wild card animal into the mix and remind people that there are a few of Ostrich and Rhea farms in the UK, but man you will need a lot of Paxo.