Red Dog Grooming 704 S Trenton Ave, Pittsburgh, PA15221 Red Dog Grooming is a quaint little shop on a quiet street in Regent Square. The red and white checkered color theme…More provides a welcoming atmosphere for customers and their pets. This grooming facility services any breed of dog. and it sells a variety of dog-related merchandise. Only a few blocks from S Braddock Ave, Red Dog Grooming is easily accessible by car or bus.