Butler Blue IV, the current iteration of Butler Blue, is the Official Mascot of Butler University. Blue is a red fawn and white, male, AKC-registered English Bulldog and can be easily recognised by the marking above his right eyebrow. There have been four bulldogs to bear the name, with the most recent, who assumed the name in January 2020, taking over as mascot in the 2020–21 school year.

Jack the Bulldog is the official mascot of the Georgetown University Hoyas athletic teams. The school has employed at least nine live Bulldogs as mascots, and counts seven named Jack since 1962, when the name first came into use, including three who are still living. The current incarnation of Jack, who will be taking over from his predecessor during the spring 2024 semester, is an English Bulldog born in 2023 whose full name is Serchell's John P. Carroll. Recent bulldogs have come from the Georgetown alumni family of Janice and Marcus Hochstetler.