This comes from my son, who is the scientist in the family. He passes it off as stress, or over active imagination brought on by grief. But even with his reservations it was real enough to him for him to mention it, so here goes. While he was at the stove he was looking over at the picture of Jay that I had put onto the refrigerator. He then turned his attention back to the pan on the stove and what he was cooking, it was then that he felt the soft fur brush across the back of his leg just as he had felt so many times before when Jay was alive. He turned thinking it was our other cat Chase, but Chase wasn't even in the house at the time.