Golden retriever with red collar

I lost my golden retriever yesterday around 3pm near the Osage Beach Premium Outlets on Bagnell Dam Boulevard. He's a big, friendly guy, about 70 pounds, with a bright red nylon collar and a brass name tag that reads 'Sunny.' He has a white patch on his chest and one ear that flops differently when he runs. I’m really worried—Sunny is gentle with kids and has been a part of our family for years; if anyone spots him, please email me at [email protected] so we can coordinate a meetup near the lakefront.