im thinking of getting a shetland pony that would be kept in a field with electric fencing, but have been told by someone you should not do this as they walk straight through it, i was then told by someone who keeps their shetlands in a paddock with electric fencing that they have never had a problem with this, 

i am know confused weather or not it will be safe to get one and wondered what other peoples experiences with electric fencing and shetlands are? 