How old is King?
Is there something scaring him in regards from the transition from inside to outside? The door, deck, stairs, etc?
Lying down might be avoidance rather then laziness
If he won't come near the door at all then I would encourage him to like that area by feeding him directly in front of the door and see how he reacts. If he's very timid or refuses to even touch his food then the door is the culprit and I would work on showing him the door isn't scary. Give him lots of treats and fun times beside the door. Same thing if it's the stairs or something else, make whatever it is the best thing in his life outside of you.
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