might be making a small comic series thing with a small boy and his dog friend that only he can see.
The dog's name is Escher; I got the name from kingofpillowland! Escher isn't even a specific gender. Escher just is.
What about Charlie or for the boy? After Charles Bonnet syndrome: a syndrome which can occur in people with impaired sight, that creates randomly-occuring visual hallucinations.
Gee willackers was that a translation
And if you're looking for names, what about Escher for the dog? Like M.C. Escher, the artist who drew those insane structures and impossible designs.
I'll try to come up with a name for the boy too.