How does this happen?

Every once in awhile we come home or into the living room and find Skye, Isaac's turtle on top of her log hut. No one ever sees her get up here, she just appears on top.

We don't know how she gets off either. We always give in and take her off so she won't fall off.
Occasionally she will be found climbing the walls of her home. Now this I would understand if she had some little turtlets but she is single and lives alone. You would not think a turtle would be much fun but Skye has proven to be an interesting pet. Millie