Flying with a Service Dog- Airport Potty Stations

I love flying out of Dulles Airport in Washington DC because they have 2 service dog potty stations right in the terminals. The one Charlie used was by gate D1 (between gate D and C) and I believe there is another one between gates A and B.

This potty station really helps out when we have a long flight ahead of us. Recently we went to Anaheim to go to Disneyland and the flight was 5 1/2 hours so it was great to potty Charlie right before we boarded the plane. I wish more airports would design a room like this for those traveling with a service dog.