"why not just get a dog?" It's funny cause pigeons actually can't survive in the wild and that's why they group up in cities because they were literally bread to be domesticated for hundreds if not thousands of years. This is similar to the Rock Dove which this might be and which could have been domesticated up to 5000 years ago.
To answer the question about the Sonic roller skates: There are a select few locations who do still use the roller skates, however the majority of Sonic locations have opted to discard the gimmick.