possible lost/stray dog south side

While walking Oliver this afternoon I spotted a dog wandering around my neighborhood. He/she had no collar or tag and has fluffy white/cream colored fur. He's a larger dog, maybe about the size of a lab. He was a little dirty and matted, but I could tell he was a beautiful dog. I had my cell phone with me so I was able to get a decent picture. The dog followed me for a minute but then my Chihuahua went crazy barking and scared him away. I'm concerned about this dog. If anyone is missing a dog in the area, he was spotted today around 4 PM near Southern Dunes Golf Course. I can post a picture if anyone wants to see it.