Uga IX (aka Russ) is retiring after this year. He'll be replaced next year by Uga X (Que).
Russ was originally an interim mascot after Uga VII (aka Loran's Best) died unexpectedly in 2009. Midway through the following season, he yielded the position to Uga VIII (Big Bad Bruce). However, Uga VIII was soon diagnosed with canine lymphoma. Russ then received a "battlefield promotion" to become Uga IX.
Que is the grandson of Russ. All Ugas have been descended from the original Uga (Hood's Ole Dan, 1956-1966), who himself was the grandson of a bulldog that accompanied the team to The Rose Bowl game in 1943, which Georgia won over UCLA, 9-0.
http://www.ncaa.com/news/football/artic ... sor-nov-21
Of course, I prefer this image of Russ, for obvious reasons: