Jessica,
I have tie outs too, but use them for camping purposes only.
I have a fenced back yard.
It is possible for him to hurt his neck if he forgets his
boundaries.
I have never used it, but I have seen them advertise.
It's a trolley line that hooks
to two posts, or two trees.
Sort of looks like a long outside cloths line.
The line has a ring that is attached to another line that
hooks to the collar and moves as the dog moves. The dog can not get tangled I think?
I will try to draw.
l---------l (line hooked to two posts.)
The ring moves up and down the
line as the dog moves back and fourth.
Hope that makes a little sense.