My daughter has posted this on 4 different sites, put up flyers around the area where she found him, checked

FOUND DOG...... Aviation/El Segundo 4 days ago, my daughter saw this dog running with his collar and leash on at this very busy intersection. She chased it for 20 minutes with another woman and her kids.... My daughter has posted this on 4 different sites, put up flyers around the area where she found him, checked him for a chip (no chip), and called numerous vets and shelters to see if anyone has come looking for him... Nothing...... I wish we could keep this little guy; he is very sweet and only wants to cuddle and be with you..... But we already have 2 dogs and 2 cats. Not sure what we do now, but we will never take him to a shelter