Sarah Ferguson, Duchess of York, believes one of Queen Elizabeth’s dogs has confused her with the late monarch. The 64-year-old author and her ex-husband Prince Andrew took in corgis Sandy and Muick after the queen passed away in September 2022, and they bring a lot of “joy” to their home at Royal Lodge in Windsor. Asked how the dogs are doing, Sarah told Britain’s HELLO! magazine: “They are such joys. I am dog-mad and they are exceptional. “Sandy follows me everywhere – I think he thinks I am the Queen. They are national treasures.” Sarah was close to her former mother-in-law and still thinks…