[Highland Park] lost German Shepherd

Around 5:00 pm this very large, sort of fluffy German shepherd was running around Beverly Place (off N. Negley, near Hampton and Bryant), hiding in backyards. He would not come to me for a treat and took off when I called to him. I think he ran down towards King Ave. and did not come back to Beverly. I hope the owner gets out before dark to find this dog because he is running across streets.