oh, my heck! i am SO glad you said that!
i had a wolf-dog, Nero. i loved that dog SO much but it came the time nobody likes. bec of his extreme fear of the vet (he was one of my palliative care dogs - he was so frightened that i never took him unless it was an emergency because his legs would flatten out to the sides and he'd lose total bladder and bowel control and the sight of a white coat put him into extreme fear aggression), i dealt with it myself.
for *months* later, i would get up from the couch and automatically pause to wait for him - and he wasn't there. i would automatically slide a foot back behind me when i was doing dishes or laundry to let him know i was going to be moving - and no fluffy footstop. the worst part was ppl interrupting me in the tub or the bathroom - he used to lie across the hallway outside the door and stop ppl from bugging me (the bathroom was too small to let him in).
about 3mo later was the first time it happened: i was sitting there watching TV and suddenly my feet grew very very warm and i felt a "huff" - exactly how nero used to rest his chin across my feet and sigh. absorbed in the movie, i automatically reached down to scratch his ears... =(
a few months later, i was outside working on the deck under a blazing sun. i had no idea how long i'd been at it but i was determined to finish "this last little bit". but i was getting a bit dizzy and woozy and was missing the nails more and more often when a shadow fell across my workspace. "Nero," i said irritably, "go lie down! go!" and the shadow passed on. the sun was way too bright when the shadow left and that's when i realized my head was pounding, the back of my head, neck, and shoulders were burnt to a crisp, and i was heading into serious dehydration. there were no clouds, nothing that could've made a shadow fall like that.
over the years, there's been all kinds of little thing happening that make me smile and think of him - but the last head-scratcher was when i was sitting on the bed after a bad break-up and the mattress behind me sank down and my lower back grew warm. Nero used to jump up on the bed behind me while i sat on the edge of the bed and used the computer. the mattress sank down far enough that i actually tilted backward, so i know it wasn't the cat (we have cat spirits too).