EMDR T once brought her dog - I found it rude to do so without prior discussion. She was like "Yeah, I only have 2 appointments today - you and a family - and I thought "Well, they won't mind if I bring the dog"". And then she 'justified' it by saying it might even help the EMDR as the dog was 'added' to the zapping lights. The dog was well-behaved, but still, I prefer to have my T's undivided attention.