Sorry havn't read the whole thread.........so sorry if its been said
You need a holding number and relevent animal movement papers
They clear and turnover ground very quickly
They also like to be occupied , they love a football to play with , I bury apples etc in the ground so they can forage for tgem
With regards electric fences , I only have mine "live" for a couple of days they soon become wary and wont go near , to the point when I strip graze them , they wont cross where the fence used to be for a day or two , even when the fence isnt there....lol