On Wednesday 2/10/2010, my sweet 4.5 year old dog, Cooper, went missing on Glen Canyon Drive in Garland, Texas. She is a Black Shepherd Mix, with a creamy white chest and under coat. She is incredibly well mannered, well trained on and off leash, and one of the most darling souls in the world. She is 45-50 pounds, short-haired, deep chested, with long sprinter legs and a long "Pointer" type tail. Please help me find my sweet Cooper.