Our 10 year old lab/ border collie mix was out in the front yard with us yesterday while my son was playing and I was mowing the lawn. He ran off for some reason, and we haven't seen him since. This is very unlike him. He is about 70 pounds, black with tan markings on his face and legs and white markings on his neck and chest. He was not wearing his collar at the time, but the humane society is aware of him being missing and has all his licensure info on file. He is somewhere in the area of SW 185th and Johnson, just north of TV Hwy. If you have seen him, please call my cell at 503-547-4394. Thank you so much for your help.