Hugo & Ruddager are Fraser and Becky's cats. They normally don't appear on Video Games Awesome, but they sometimes get passing mention, and sometimes appear on the farfromsubtle YouTube channel when Fraser announces a live show. They seem to enjoy chasing cameras and climbing all over the place.
In Skyrim, Fraser's second (and technically, third) attempt at a playthrough without breaking the game had a Khajiit in the likeness of Ruddager, also called Ruddager, as his character.
Presumably, Ruddadog is the dog equivalent of Ruddager