My Rio makes no barks or dares. In fact he has learned to do a studious ignoring that is quite convincing. Beware squirrel, this is feigned disinterest. One bite and you are gone.
He does, when we are walking or he is on the deck with me and in heel or down/stay, get an aggrieved look about him - as I might should some bully swear at me where I cannot answer back - and I go away ignoring but my face heated and my fists clenching, or wanting to.
An aside:
Rio has taught me something about behavior. This is an aging dog who can move very slowly because of his arthritic knees. Stairs are a trial for him, yet he insists on going upstairs so that his coming down is labored, painful, slow, careful, and risky (he has fallen and slid down).
Yet if I whistle for treat or dinner - he flies down those stairs like a young pup, or should I pick up his "fetch," (which I no longer do to preserve what's left of his knees) he is all energy and enthusiasm. Say "dinner, dinner, dinner" to him and he can spin in a dance like a little Pomeranian for you.
Ask me why I still keep horses, and labor heavily in a garden almost every day. Or stack firewood, all with enthusiasm. Love and beauty, food and flowers, and sitting near the wood stove in the dead of winter should be your answer.
Nothing like enthusiasm, now is there?