Halo For Blind Dogs Diy . As the name implies, these devices look like a halo that goes around a dog’s head, and they act like a bumper — before the animal runs into something, the halo will hit it first. Muffin’s halo for blind dogs comes in four different sizes. Pin on Muffin's Halo For Blind Dogs from www.pinterest.com However, blind dog halos can be pricey, and. This will be the approximate length of the aluminum strip. It contains an extra d ring that allows better control on the dog and prevents pulling.