I miss my girl sitting with me in the evening and surely it’s not normal for a dog to want to be alone? I don’t think it’s pain as we had the opposite problem before we got her arthritis under control- she’d pant and pace the entire house. Still loves a walk, food and a quick stroke but as soon as she’s finished goes straight upstairs and looks on edge if I go up to her. To her delight I currently have an old sofa, 3 mattresses and chair cushions waiting to go to the tip in my room and she loves hiding amoungst all this crap completely hidden from view, like a cat 