We run a registered breeder herd and value our animals for THEIR value......that said, we have both electric and woven wire. The wire is of the type that has small openings on the bottom and they get larger towards the top. In MANY years now, we have NEVER had a goat get it's head stuck in a fence line. Creep feeders, hay feeders, branches, and even in the wheel well of my RTV; but never a fence. Anyway, we very early on discovered that they love to rub against the fence in order to shed fur and just scratch. A single strand of electric wire, we use all aluminum, takes care of that situation.
In addition to the woven wire fencing we have several pastures of just electric fencing. Yes, after a storm, little babies getting through it till they get zapped, and dumb coyotes do cause a break from time to time. We use the flashing devices to tell us when we have a problem. We have discovered that even when it is off for a day there has been no problems as the goats really dont test it. NOR do the guard dogs.........YOU are planning on having something out there to protect them????????...........Another subject.
Anyway, on the woven wire and the electric, which is 4 wire at 6", 12", 18", and 36", the t posts are spread at 10 paces with 6" wood posts at the corners,in concrete, using an "H" type brace and also wood posts where there may be an extreme elevation change. This would be a dip or something like that............
Our land is heavily wooded and sloped, perfect for goats, so working around slopes and trees is sometimes hard. That is the real reason for the electric fencing actually. It really is also the cheapest. OH yes, we do electrify the gates also. I get so tired of a 450lb billy standing on them, so started doing that awhile back and it sure cures them..........
Good luck and God bless..........Dennis