In front of me, a grey furred animal that was either half-grown wolf cub or dog emerged from the open door with arthritic slowness. I kept my hand on the shard gun and eased away from the wall, watching. The animal was not much over knee height and it moved on all fours, but there was something badly wrong with the structure of the rear legs. Something wrenched. Its ears were laid back and a minute keening came from its throat. It turned its head towards me and for a moment my hand tightened on the shard gun, but the animal only looked at me for a moment and the mute suffering in its eyes was enough to tell me I was in no danger. Then it limped painfully along the corridor to a room farther down on the opposite wall and paused there, the long head down close to the door as if listening.