This is the way I make it . This way keeps the dog from biting the spring or bungie cord. I would hate for him to clamp down and break a tooth.
here is what you will need.
1= some rope
2=a spring or heavy-duty bungie
3= a bite surface( old cloth ,large rope, etc etc etc )
cut about 2 1/2 feet off one end ,save the other. (the other may vary for length to the hook up) lay that aside for now.
bungie or spring whichever you will need to bend the hooks to make an eye out of them like this
step #3 pass the long rope through both eyes and tie off to self(if using a spring just go through one end ). tie your short rope to the rubber part of the bungie .should look like this
now you tie the other end of the short rope to your bite surface .this is what it should look like when you are done .(got my demin back lol)
find somewhere to hang it .if you dont have a tree you could use an A frame swing set(no swings)or build a upside down L post use your imagination.one of my buddies put a big screw hook in the eve of his house and hung it there( you must hit a rafter or strong brace). tie the long rope up so that your dog can reach the bite surface standing up at frist .as he gets better with it you can move it up higher so he will have to jump.
always watch you dog. He can hurt a leg or bite the piss out of his tongue .so keep an eye out for this .
be safe and enjoy