Fence Jumping

Question
I have two dogs, a 3 year old black lab and a 7 month old German Shepherd. I have a 5 1/2 foot fence enclosing the backyard. But whenever I take the Lab on a seperate walk, my german shepherd will bark and jump the fence. How do i stop my german shepherd from jumping the fence?

Answer
There are people that might prescribe a regimen to keep the German shepherd from jumping the fence.  And perhaps giving it a 3 hour walk first would leave it too tired to jump the fence.  

I seriously doubt it can be trained not to jump the fence.  I would not leave it in the fence unattended.  If walking the other dog is enough to entice it into jumping the fence, stray dogs, kids, etc. could any time you are gone.  You need to leave it in the house.  if you are not comfortable with it unsupervised, loose in the house, crate it.  The dog may be
happier in its den than loose in the house.  It relaxes, it feels safe in its
den.  It rests, the body slows down reducing the need for water and relieving
its self.  Dogs that have been crated all along do very well.  Many of them
will rest in their crates even when the door is open.  I think the plastic
ones give the dog more of a safe, enclosed den feeling.  Metal ones can be put
in a corner or covered with something the dog can't pull in and chew.  Select
a crate just big enough for the full grown dog to stretch out in.

Leave it some toys.  Perhaps a Kong filled with peanut butter.  Don't leave
anything in the crate the dog might chew up.  It will do fine without even any
bedding.  You will come home to a safe dog and a house you can enjoy.

A dog that has not been crated since it was little, may take some work.
Start out just putting its toys and treats in the crate.  Praise it for going
in.  Feed it in the crate.  This is also an easy way to maintain order at
feeding time for more than one dog.

The "shut the puppy in a safe room" is a fallacy.  Very few houses even have a
safe room.  How many of us have a room with a hard surfaced floor and nothing
else?  Most rooms have electrical cords to chew if nothing else.  In addition
to destroying anything a bored puppy finds to chew, it may choke or have
intestinal  blockage from the pieces.  I had a friend that left her dog in a
"safe" room.  It ate a hole in the floor covering.  The safe rooms fail to
give the dog the comfort of the enclosed space their instinct requires.  Nor
do they restrict activity extending the time the dog can go without relieving
itself.