Black and white border collie mix with red collar

I’m posting because I lost my dog yesterday around 6:15pm near the Old Mill District along Deschutes Ave. He’s a medium-sized black and white border collie mix, about 45 pounds, with a bright red collar and a blue glow-in-the-dark tag. He also has a tiny white tuft on his left ear. He’s microchipped and generally friendly, but can be shy around strangers and might bolt toward other dogs. Last seen with a squeaky rubber toy in his mouth near the river trail by the Old Mill. This dog means the world to me and I’m really hoping he’s found soon; there’s a gentle reward if he’s returned safely.