【明報專訊】On a recent US domestic flight, as I approached my seat on the plane, I was surprised to see that next to my seat was a woman holding a pet dog, who had a big visible tag saying "Therapy Dog". In front of her seat on the floor, she had already laid out a carpet with a towel, a stuffed toy and a chewing bone. A small "home" was made for the therapy dog. I had never seen an animal on a flight before, and on this occasion, I had an opportunity to sit next to one! Curious, I had many questions to ask my neighbour passenger. I learned a lot.