Want to keep your blind dog entertained for hours? Introduce a fly into the house. The other day, Ray spent at least half a day trying to catch a rather large housefly buzzing around. I've never seen him so focused and determined.
I don't know if you can see them in these photos, but there are nose prints all over the glass doors. All the windows too.
I'm thinking of letting another fly in the house today just to keep Ray busy and away from my shoes.