The leading causes of death in young or adult LGDs is being hit by a car, wandering away, or being shot as an intruder off property. These dogs were developed to live and work on open pasture or rangeland and they are just trying to do their job by expanding and patrolling their territory.
The best method of containing an LGD is by his learning as a young dog that it is impossible to get out of his
fence. Once he learns to escape he will do it again.LGDs can easily jump or 3 or 4 foot fences and slip through widely spaced wire fences. Digging and climbing can be discouraged by electric scare wires placed low and high or using invisible fence as a secondary deterrent to a less than robust visual fence. Invisible or radio fencing can also be secondary fence in areas where snow or drifting can cover physical fence. Gates need to fit tightly and pipe gate
should have woven wire placed over them. Dips, ravines, uneven ground, gaps, and waterways are all potential avenues for escape and need to be dealt with. Sheep and livestock panels are also good for more secure enclosures for a young pup.
Invisible fence is not suitable as an only fence in most cases since a LGD who is dealing with a threat will take the hit and blow through the fence. It also won't keep other roaming dogs or predators off your property. It is very useful as a backup to physical fence and I use it myself to help train young dogs to respect fences.
There are several options for good fencing and I do illustrate and describe the more completely in my book. There are also other good sources of fencing information. I'm not sure if this is acceptable but Premier 1 Sheep supplies has a wonderful and informative catalog and website offering lots of options for different stock and LGDs. I have no connection with them all but they are very attuned to the use of LGDs and fencing.