When it comes to barnyard animals, goats might be the weirdest. Unlike sheep, which are content to stay with their herd, goats are naturally curious and independent, often getting into mischief as a result.

In a recent interview with National Geographic, University of Maryland sheep and goat expert Susan Schoenian explained that of all the livestock she’s worked with, goats exhibit the oddest behavior. Even getting them to stay in a pen proves surprisingly challenging.

“We frequently tell people [that] if you want goats in a fence, you need a moat,” she says. “They're always looking for a way out.”

If and when goats escape their confines, they can pop up in places that humans would find challenging to reach—behaviors we’ve repeatedly