Golden retriever with blue collar near Crown Center

Yesterday around 3pm we were by the Crown Center fountain on Grand Blvd in Kansas City when he bolted after a squirrel and disappeared. He's a medium-sized golden retriever, about 60 pounds, with a bright blue nylon collar and a small stainless steel tag. He has a white patch on his chest and a tiny scar behind his left ear. He answers to Nova and is usually friendly, but may be shy with strangers; this dog has been with us for eight years and means the world to my family. If you spot him, text me or email me so we can arrange a meetup.