Animals do express more than most people its just that most people are too dumbed down to understand body language any more...
I think most animals, wild or domesticated, think we're rather amusing, clumsy, mostly-benign sources of food. I can imagine them saying stuff like: "Could you walk any louder?" "No, not there - lower - yeah, that's it." "That smells good. Drop it. Dropitdropitdropit."
"This dollar store kibble tastes like ass hair." "If I was just thirty pounds larger, I'd eat you in your sleep."
Mine would say "I told you that I resent you going out without me, so if I chew while you are away, it is your own fault." "Do you realize that your telling me to stop barking is louder than my barking?" "People are strange and need to be trained!"
True, their body language speaks volumes lol, yeah but I've noticed that most dogs seem to like the taste of ass hair.
my dog would probably look at me and say "mama, what's wrong with my balls? they're smaller now and licking them isn't as much fun." then i would feel sad for him. i already do.