Roof!!
Is the roof’s safety greater than that of the interior? Is it possible that sleeping at a greater height gives him a sense of security? Is it possible that the kennel’s roof is cooler than the shade of the interior and ground, or could she be just resting? Perhaps she has been napping. She might have been reading too much of The Peanuts and emulating Snoopy’s trend.
It’s amazing how unconcerned she is with the sharp edge of the roof, but it’s remarkable how she has balanced her halves on both sides of the roof and hasn’t fallen off. She is exhausted and could use some unusual comfort. Unconventional!