I am sure we could come up with many "translations" of Kim's Quarter Horse Bam's facial expression, but in reality she may just be trying to get a better "whiff" of an odor left by one of her equine companions.
While it appears that Bam is turning up her nose or laughing, this behavior is called the flehmen response (from the German, meaning to curl the upper lip). Horses, felines and other mammals draw their lips back to facilitate the transfer of pheromones and scents into another of their organs, called the Jacobson's Organ.
I have witnessed my cats engaging in this activity often when I am introducing a new food. Initially I thought that it was a negative comment about the product, but in reality it is giving them a higher degree of information. And I took it purrsonally for such a long time.
But don't you think that this is a funny face? If I didn't know better, I would be tempted to think that she might have been commenting on the recent Presidential Primaries!
Have you observed your pets displaying a flehmen response? What did you think it meant? Leave a comment and let us know.