For years, I’ve searched for this story. It is a children’s short story that came out of an old school reader that I had in first grade. I was in first grade in 1977 in Spruce Pine, NC, USA. I’m sure the readers were pretty old by then. The title of the story was Puppy Cat, I think. It was a dog who thought he was a cat. There are several newer stories that are similar, but I’ve been looking for this particular version. I’ve had no luck over the years!