So what’s water got to do with it? When dry, these microscopic pieces of dung don’t emit a scent. H20 breaks down the chemical bonds that hold the micro-excreta together, releasing a fog of musty molecules into the air. As water evaporates it also raises the relative humidity in the air surrounding your dog. Humid air can hold more molecules (warm air does this too, and together heat and humidity can have a compounding effect on smell), and the higher concentration of molecules in the air means more can make their way into your nasal cavity to assault your olfactory receptor neurons.
June 1, 2015 at 9:36 AM EDT