Dear Bay Weekly:     I wrote to you over three weeks ago, when we were desperate for help to find our cat, Murphy, who was missing as of about June 5. I could not have asked for a more supportive and caring response.     You wrote a story complete with picture and anecdotes about the 250 flyers I put up, the state trooper who, after seeing me drive erratically through Huntingtown to post a flyer, took flyers to hand out and helped me make a U-turn to get back to...