Completely overlooked this article, but then @SteemSTEM distilled caught it for me. Great work! I love this topic and was actually considering writing about it, but you beat me to the punch. The dog test in particular was a cool finding. I had read about a similar test in dogs that tested their reaction to modifying their urine (https://thesciencedog.wordpress.com/2017/08/23/does-this-smell-funny-to-you/), but I overlooked the study you mentioned. Again, excellent post!