We have a stream that runs alongside our drive and along the bottom of the garden, it has steep sides going down to it and ususally flows about a foot or so deep and will be about 5 foot wide. We've had porkers escape and get into the garden and they just jump in and wade along and scramble up the other side

or wade down stream to the neighbours garden

. It's great fun trying to retrieve them when its pitch black, you're not sure how many are out and you just keep hearing the splash of a pig jumping in! Not sure whose screams were loudest the pigs when they're caught or me screaming at the pigs