HOT, LOL? Here in the UK, haha? No chance, it's been rain rain rain and floods all summer.
Does you dog seem anxious in any other way? I know mine likes to wander off up to the greenhouse and lay in there sometimes. She likes it in there even though it's right up the garden.
It might be nothing to worry about really. She might just like it under there if she feels it's secure and she doesn't get disturbed.
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