Sentence:  So if you hear a woman ask in a sing-song voice, “Do ya wanna go for a <WSD>walkie</WSD>?” you can probably safely infer that she is talking to her dog; there is a small chance that she is talking to a very young child, but virtually no chance that she is talking to her husband or an adult friend. 
Meaning of the word marked with <WSD> tags:  An outing for a dog; the taking of a dog for a walk.