My daughter had a pet turtle run away. Yep. A turtle. Named Margaret.
We saw the box turtle lying in the roadway, sunning itself, so we thought it would be fun for Leah (age 5 or 6 at the time) to have and learn from. We duly got an aquarium and all, and got Margaret set up.
So one day, she took it out to play…yes, she took the turtle outside to play…and decided to make Margaret a mud pie for her "birthday," but she got into her project and turned her back on the turtle, who took advantage of the opportunity and disappeared.
We found out a few weeks later at a nature center we were visiting that box turtles never leave an area about 100 yards around where they are born, or else they don’t know where to find food or water.