So, yesterday Thor was attending Mark's reading class, as he always does. When he heard me ask, "Who is Thor?" his ears perked up. Thor was a kitten in the story.
Our Thor didn't understand, so Mark gave him the book. Since there are no pictures in the book, Thor got bored with it. And he still didn't know: Of what use is a kitten?
Then we showed him a picture of our first Mastiff, Sarge, with his kitten, Graceful. AH HA! A kitten is a friend of Mastiffs! Why didn't anyone say so???