Hackles Feedback Hypothesis

“The facial feedback hypothesis, rooted in the conjectures of Charles Darwin and William James, is that one's facial expression directly affects their emotional experience. Specifically, physiological activation of the facial regions associated with certain emotions holds a direct effect on the elicitation of such emotional states, and the lack of or inhibition of facial activation will result in the suppression (or absence altogether) of corresponding emotional states.”https://en.m.wikipedia.org/wiki/Facial_feedback_hypothesis

I ask, does smoothing or raising a dog’s hackles affect their emotional experience??