Medium sized white & brindle mix dog loose on 28th St close to 23rd Ave

No tags or anything; came out from between two buildings on the west side of the street. I couldn’t stop to help or snap a pic bc he or she was very interested in my dog and my dog wasn’t having it. But Im worried and I wanted to get the word out. Dog looked healthy, probably around 45lbs. White socks and white chest I think? It was following me and my dog until I firmly said NO which it immediately responded to and went back to the sidewalk as we were crossing the street, so it’s got to be someone’s dog and not a stray.