"I must agree with the other reviews - a Muffin's Halo is simply a must-have for any blind dog. I recently adopted a blind dog who is also deaf - so I couldn't even warn her before she would bump her little head! She also does not do very well on a leash. I had joked with my family that she really needed a little helmet to protect her head - and, low and behold, I stumbled upon Muffin's Halo. The Muffin's Halo has helped her learn her way around my home and the back yard without hurting herself. Now, anytime I take her somewhere new, I put her halo on and she can explore without fear of getting hurt! It's easy to assemble, put on and take with me."