I came up with this idea one day when I was taking my dog out for a walk and found out that she had chewed off her halter. What I did was made a temporary halter using just the leash. You can make this out of any length leash. Here are the pictures showing how to make it.
Step 1: Making the Leash Halter
First find the dog your going to walk.
Step 2: Step 2
Bring the leash around your pets neck and bring the end with the clip over the rest of the leash.
Step 3: Step 3
Wrap the clip end around under your pet, but make sure you leave some slack around your pet's neck.
Step 4: Step 4
Bring the clip up and secure.
Step 5: Now for That Walk
Now you have the emergency dog halter made out of a leash.
I hope this helps someone. If you have any questions or comments I would love to hear them.