Tan and white terrier mix with blue collar

I lost my tan and white terrier mix yesterday around 3pm near the Santa Fe Plaza by the Palace of the Governors. He's about 22 pounds, with a bright blue collar and a tiny silver tag, plus a faint white stripe down his chest. He has a small crescent scar on his right hind leg from a tumble last month, and one ear kind of flaps when he's excited. I adopted him last year and he's my constant companion, so I'm really worried and he means a lot to me - if you've seen him around Canyon Road, Loretto Chapel, or the Railyard, please get in touch.