The speaker wishes for a break from language. Watching dogs run along trails, she imagines they know a stillness that people with their constant talk can't reach. She hopes to follow them, letting her words "walk" and then "slink away tired / and sleepy and sated," as if words were animals worn out after a long day outdoors.
What she asks for is simple: to lie in the grass in the sun, to spend hours without letters, to throw away sentences and syntax. The last lines suggest she is guessing, not knowing. She "suspects" dogs feel no emptiness, only the rush of running through the woods "wild as wordless wind."
The mood is drowsy, wistful, and a little playful. Repeated sounds, like the soft s's in "sleepy and sated" and the w's in the final line, make the poem feel relaxed and breezy. It reads like a wish whispered by someone tired of thinking in words.