Black Dog, White Dog

Poor Mrs Joesblips is not feeling very well so today I insisted she go to the doctor. In fact I insisted on going with her to plead her case. She has had sinus trouble, watering eyes, headaches, fevers and coughs and sneezes for just over 4 months now. Three previous visits to the doc have failed to make any progress and with a trip to Venice lined up for the two of us next week, I want her as fighting fit as possible. She has been put on a third regime of antibiotics but crucially, as soon as we return she is booked in for a sinus x-ray and complete blood tests.
You can imagine, there was very little blip time and indeed just about as little blip interest today but before we drove home from the doc we went around to the beach where I noticed this rather large black dog stopping to see who or what was following him.