The K-9 Unit (also known as Fido's Police Buddies), are a group of dogs that work for the local authorities, though the term usually refers to the team of Fido, Ralph, Kevin, Terrance newcomer Fox, and Mungo.
After graduating from the Police Academy, officers are placed in the K-9 Unit. All members of the unit wear special blue vests with 'K-9 Unit' etched on them, along with special collars that can be used as a walkie-talkie while on duty. According to Fido; K-9 Unit members are trained to sniff out drugs, track people and attack suspects when ordered. Under the ruling of Terryson v. Florida, police dogs are permitted to arrest human suspects and read them their rights, within the extent of the law.
|Dogs||Peanut | Bino | Fox | King | Tarot | Fido | Joey | Sasha | Tiger | Bailey | Ralph | Kevin | Duchess | Rex | Lester | Dallas | Yeltsin | Boris | Satau | Mungo|
|Cats||Grape | Max | Sabrina | Marvin | Res | Jasper | The Bigglesworths | Fiddler and Keys | Delusional Steve | Ptah|
|Others||Zach | The Milton Ferrets (Keene, Lana, Rock, Simon, Pit and Duke) | The Wolves Pack | Karishad | Raccoons | Itsuki | Jessica | Spo | Squeak | Jata | What Chicken | Bruce and Roosevelt|
|Humans||Earl Sandwich | Jill Sandwich | Ryan Byron | Bill Lindberg | Jerry Arbelt | Jeff | Jake | Jeeves | Mr. Steward | Joel Robinson|
|Fictional||Spot (Superdog) | Stripe | Jim-Jim | Bat-Bat | Regular Hawk | Criminals | Pridelands Characters|
|Celestials||Pete the Griffin | Spirit Dragon | Great Kitsune | Cerberus | Bahamut | Denizens of Heaven|