Black and white border collie mix, blue collar

Yesterday around 3pm I lost my dog near the Walmart on 17th Street in Idaho Falls, East Idaho. He's a black and white border collie mix, medium-sized about 45 pounds, with a blue reflective collar and a green camo harness. There’s a white patch on his chest and a tiny scar on his right hind leg; his left ear tends to flop when he's excited. The name on his tag is 'Milo'. He’s really friendly once he warms up but can be a bit wary of strangers. I’m beyond worried—this dog is family to me and I just want him home safe. If you’ve seen him around the Snake River Greenbelt behind the Walmart or anywhere nearby, please email me at [email protected]. Thank you.