According to the narrator, which kind of dogs is thought to have a sense of humo

The question of whether dogs have a sense of humor is often fiercely argued. My own opinion is that some have and some haven’t. Dachshunds have, but not St Bernards or Great Danes. Apparently a dog has to be small to be fond of joke. You never find a Great Dane trying to be a comedian.
     But it is fatal to let any dog know that he is funny, for he immediately loses his head and starts overdoing it. As an example of this I would point to Rudolph, a Dachshund I once owned, whose slogan was "Anything for a Laugh". Dachshunds are always the worst offenders in this respect because of peculiar shape. It is only natural that when a dog finds that his mere appearance makes the viewing public laugh, he should imagine that Nature intended him to be a comedian.
     Sometimes Rudolph overplays his sense of humor, a typical example of which is he once stole ducks from a farm nearby and brought complaints on me. It is true that Dachshunds and other dogs have their faults, but they seem unimportant compared with their virtues.