Dogs are masters of silent body language.
It must seem to them that we are always shouting.
There was a Gary Larson cartoon I like which went:
What you say: “Good dog, Corkey”. YOu love to play with that ball don’t you Corkey. Does Corkey like his ball, yes you do. You’re such a good dog. Aren’t you Corkey. Corkey, you want a treat?”
What he hears: “blah, blah, blah Corkey. Blah blah Corkey. Blah, blah Corkey.”