A quick update on the patient. Have bought arnica ointment and applied it liberally today. She spent a peaceful night sleeping on our bed, and although a little stiff when she awoke, was keen to go out for a walk. Took her back over to the scene of the crime where she thoroughly enjoyed herself. When we reached the boardwalk she strolled across, and in fact was very interested in the ducks and was practically in the water on the other side. She also waded cheerfully through all puddles. So no sign, thankfully of any residual worries at the location or associated with water. She has spent the rest of the day snoozing either on the sofa or on the bed, looking very relaxed. Her appetite is fine and in every possible way she seems to be recovering well. Thank goodness.