Ask the Vet / Dogs / January 2015 Newsletter A / Seth Mayersohn January 8, 2015 by Seth Mayersohn · Published January 8, 2015 · Last modified January 14, 2015 Ask Seth: How to Know if My Dog Is Losing His Vision? My dog has hazy eyes. His behavior is changing slightly. How do I know if he is losing his vision? What do you recommend to help him?