I work for a save a pet organization. Some time ago while leaving the grounds a very dirty but friendly dog approched me so I brought him in and gently cleaned her up. She was very cold but did not appeire injured. After a towl dry and some kind words I locked her in a dog run and went in to get her food and water. To my supprise she had vanished ! This is a very secure dog run and as allways I shut and locked the gate. We only lock the gate if it's occupied and it was still locked and wet paw prints were still there. We also have a stray cat that has hung around for many many years but no one has ever been able to get near it and I starting to notice that cat never seems to age.