Why a Jacob needs more fence than most sheep
A Jacob sheep is safely contained by a fence designed for agility and horns together. Jacobs are a light, primitive breed, quick on their feet and noticeably more athletic than heavier lowland sheep, and many keepers are surprised by how readily a Jacob will jump or scramble at a fence that would hold a larger breed. Plan on at least four feet of woven wire, and four and a half feet where the inside ground is higher than the outside, where sheep run downhill toward the boundary, or where a lively flock has tested fences before. Height only works if the Jacob cannot go through or under instead.
Horn-safe woven wire for a Jacob
Small-opening woven wire is the correct fence material for a Jacob, for a reason specific to this breed. Jacobs commonly carry four horns, sometimes more, arranged so that a head pushed through a wide square of mesh or a cattle panel can enter at an angle the horns will not let it reverse. A trapped sheep can injure its neck, damage horns, or strangle if it panics unseen, so the openings in a Jacob fence must be small enough that a head cannot pass through in the first place. Keep the wire taut and the posts firm, because a slack woven fence forms pockets a Jacob can work a horn or hoof into.
Electric support and jump deterrence
An inside electric strand at nose height teaches a Jacob to keep off the woven wire, which protects both the sheep and the fence's tension. A second strand above the top of the wire can discourage a sheep that has learned to rear and scramble, though for most Jacobs a sound, visible, well-tensioned fence of proper height removes the ambition, since sheep jump mainly at fences they can see through to something they want or that feel flimsy on contact. Manage the temptation side of the fence too. Rank growth, a hay feeder, or the rest of the flock visible just beyond a boundary invites testing, so avoid placing feed and water tight against the fence line.
Gates, corners, and lamb gaps in a Jacob paddock
Gates for a Jacob paddock should match the full fence height, hang true, and close without a lamb-width gap at the base or the latch side. Jacobs investigate gate areas persistently, and a gate that sags into a diamond-shaped corner gap is an invitation to a breed built for squeezing and climbing. Fit latches that a rubbing sheep cannot lift, and check that gate frames have no wide grid a horned head could enter. Corners deserve the same horn-safe thinking.
Maintaining a fence a Jacob respects
Inspect a Jacob fence with this breed's talents in mind: look for stretched wire at browsing height, scuffed posts where sheep have reared, and tracks or flattened grass outside any suspect section. After moving Jacobs onto new ground, check the boundary daily for the first stretch, because a curious flock maps a new fence quickly and finds its weakest point before a weekly round would. A Jacob found out repeatedly is locating a real defect, usually a gap, a climbable corner, or a section effectively shortened by terrain. Fix that specific point and consider whether the whole line needs the extra height there.
Keeping Jacob fence knowledge shared
The details that keep a Jacob in are specific: which corner allows climbing, where the ground drops outside the fence, and which stretch needs re-tensioning after rain. When several family members tend a small, clever flock like this, those observations need to be written where everyone can find them. KinsLe Family Sharing holds this Jacob's profile and paddock notes in one shared place, so each helper walks the fence knowing the same weak points.