So we saw this at the dog park today.
It's called the Halo vest and is used to help blind dogs not bump into stuff. Seeing it in action for myself in the woods with an off leash blind dog was mind blowing. She walked right up to me, lightly touched my legs with the halo, and then stopped right away and looked up at me and barked. It was amazing and the dog was using like a blind person would a cane.
I had to look it up when I got home and share it. Very cool idea and product and seeing it in action is outstanding.
There is a video of a scottie using one after the jump if anyone is interested.
Halo Vest - Life with dogs TV
One we saw had the ring a bit larger and was made out of plastic.
~Chris~