The Passed Out
Dogs that sleep indoors prefer to lie in a ‘passed-out’ sleeping position. This position allows it to cool its temperature down in an efficient and quick manner.
Dogs that are highly active and energetic throughout the day tend to sleep on their backs in this position.
Additionally, relaxed, secure, and happy dogs tend to tilt up their legs as they sleep, which is a sign that it’s comfortable in its surroundings.
Such dogs are extremely confident about themselves and are also quick at adapting to new and different situations.