Lost small brown Dachshund named Charlie with a white chest mark near Alamo Heights, San Antonio.

My small brown Dachshund named Charlie went missing on Tuesday morning around the Alamo Heights area while I was out for a walk. He slipped out of his collar when he got startled by a loud noise, and I’ve been searching everywhere for him. He’s very friendly and has a white mark on his chest. Please help me bring him home!