Although not in Scotland, actually we're in North Devon & probably couldn't be further away and still be in the UK

, we are llama keepers.
Our standard fencing is probably no more than 3'6" and the llamas are very respectful of these fences and apart from the odd occasion they have never tried to escape - the odd occasions have been once when spooked by dogs and the second a female trying to escape from a male during a "spit off"!
We're having a new field done and are aiming to have a 4'6" fence with stock fencing at the bottom and a double rail at the top - we're going for something more substantial as these fields are not within seeing distance of the house and around our house there is more than one fence they'd have to clear to get onto a road whereas with these new fields they have only one hence them being a bit taller!
Hope that helps!