December 15, 2010 6:58 am What a Good Dog! Mary Remer, long known as the Main Line’s dog whisperer, has opened a huge place in Chester County where you can board board/train/groom (they do everything!) your dog. It’s called What a Good Dog. US & World Videos 9:49 Danger in treats left out for pets: The Lineup 0:28 Dangerous dog treats found along Lehigh County stretch of Appalachian Trail 0:18 Former PAL coach sentenced for sexual assault of teen 0:50 Pat's Steaks set to reopen and add new items to their classic menu 1:56 10-year-old boy killed, another boy and teen driver injured in Wilmington crash