A 4-footed audience member?!?

Yesterday when we came out for the curtain call, I heard this strange sound over the music.  Eventually, I realized that odd silhouette I was seeing was a dog roughly the size of a spaniel that had its front paws on the armrest and was barking its head off.  (I imagine the music and clapping were hurting its ears.)  This was no service dog - a working dog would be bigger and better-behaved.  Who brings their dog to the theater?  I can't imagine the poor beastie enjoyed the show, and it may have bothered some of the patrons, especially if they had allergies.