Who let the dog out?

Right after recess I went to a kindergarten class to pick up a couple kids for screening. Everyone was standing outside looking at the teacher holding a terrier puppy that could not have been more than 7 or 8 weeks old. I joined the crowd and asked the teacher if it was show and tell time - should I return later? "Oh no, this isn't show and tell. One of my girls brought her dog to school, it's been in her backpack all morning." I was completely unhelpful as I couldn't contain my giggles.