The Distressed Shepherdess of Raydale

So, there we were, enjoying a peaceful walk around Semerwater, when we were passed by a quad bike driven at high speed just outside the hamlet of Marsett. The rider seemed in a hurry but we thought no more of it and carried on walking. The second pass was faster but this time we merited a glance, on the third pass, she stopped and asked if we'd seen her dog! The rider was a middle-aged woman and her quad was equipped with a home-made scabbard, in which rested a very well-work metal shepherd's crook. The Shepherdess explained that her dog had taken herself off for a walk, not an unusual occurrence, but had failed to return, prompting her high-speed search. She then said that the dog answered to the name of Nell, but then said it was best not to call her if we did see her, as "she's not very nice". Her concern was that the dog had been stolen, as there had been a few cases of this reported in the Dales recently. A young dog, she explained could be worth £5,000. Nell, however, was 8 and "getting a bit old", nonetheless, she might still be worth £1,200 to £1,500 to someone who needed a dog and wasn't too discerning as to where it came from. We took the Shepherdess's phone number and agreed to get in touch if we saw any sign of Nell on our walk. Couldn't help but wonder as to the nature of their relationship; obviously they worked together, but the Shepherdess had little in the way of affection for her co-worker. Had Nell been stolen, or merely taken herself off in search of a more companionable accommodation for her later years?