Lost Dog: Rex, Last Seen on Cedon Rd

Missing: My best friend. His name is Rex and he is loosing his ability to use his back legs well so he stumbles and falls without support. He didn't have his collar on. Pics are included, pm me for information or just say where u saw him please. He was last seen on Cedon Rd near Muddville in Caroline County. He’s 9 years old Black and brown brindle with white patches on snout chest and paws he went out at 11-11:30 to use the bathroom and he vanished