"There are lots of reasons why cats love boxes, but the main one is because they’re confined, enclosed spaces," Purina notes.

Take Brooks the Golden Retriever for example. He's a pretty typical pup—except for his cat-like choice to hang out in a box!

Charlie enjoys looking down and watching cars from the windows of his new home An abandoned cat who clawed his way out of a taped-up cardboard box is now ... and I see his head move from side ...