bear in mind that under the sheep welfare code horned sheep of any breed should not be contained by electric netting. (the actual term used, at least in the Scottish welfare code is electric mesh fencing). So if you are going to use electric and have horned rams, it must be the multiple horizontal wires type not the mesh type.
Personally, I have always struggled to keep my Shetland non horned ewes behind electric once the grass outside is nicer than the stuff inside, altho it is fine until that is the case.