small white dog running up mercer street

i'm not sure if anyone is missing their dog, but i just witnessed a small white dog run up mercer street on the sidewalk, into the street (thankfully there were no cars coming), and continued running until it was out of vision. there's a pink/red leash on it and no one was around. just a heads up in case someone's sweet baby got lost! it was running so fast, couldn't keep up with it.