The deeper the sleep, the heavier the dog. Most people who sleep with dogs develop spinal deformities rather than rent the heavy equipment necessary to move their snoring canines to a more appropriate part of the bed. The stretch and roll method is very effective in gaining territory. Less subtle tactics are sometimes preferred. A jealous dog can worm his way between a sleeping couple and, with the proper spring action from all four legs, shove a sleeping human to the floor.
Dogs possess superhuman strength while on a bed.
As you cling to the edge of the bed, wishing you had covers, your sweet pup begins to snore at a volume you would not have thought possible. Once that quiets down, the dog dreams begin. Yipping, growling, running, kicking. Your bed becomes a battlefield and playground of canine fantasy. The horror of this wake-up call haunts you for years.