Wind at it's backside as per usual. It doesn't matter if they are on the hills, or flat land. Timber or no timber. 99.9% of the time when bedded down. They put their backside towards the prevailing wind.

https://live.staticflickr.com/65535/52159230737_2fee61f69f_c.jpg
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My only interest is wild canine Biology & Behaviors.