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Couldn’t find one I read years ago. I think this along lines you asked about though.
Do know depending on the mood we are in our bodies put off different pheromones.
May seem silly, I used to do lots of meditation, which can give a calm collected center, as well as allow one to go into that state at will a result is changing your smell/pheromones. Dogs really seemed to respond to it. Most very well, but those that seemed to be raised in households with lots of tension would be scared as it was something new to them.
I’ve often thought dogs know our emotions more through smell than observation.
