My cat once ran away, and everyday i would sit by the door waiting for a miracle, crying, then 10 days later at around midnight we hear "meowwwwwwwwwwwww" at the door, and we open it and its our cat! It ran away because it ran into the back yard and caught a bird and we set the bird free so the cat got mad and ran away and i guess it proved to itself it caught another bird then decided to come back. Now when we let her outside she just kind of sits there and eats grass >.>