Angry Guard Dog / Western Animation

• In the animated "Family Dog" episode of Amazing Stories, the dog fails to stop two burglars in two consecutive occasions, so he's taken to an obedience school where he's trained to become, in the words of the owner, "a quivering, snarling, white-hot ball of canine terror." When the burglars return, not only does the dog viciously attack them, he even follows them home. There they end up adopting him and using him to commit crimes, until there's a falling out and the dog attacks them again before returning home.
• Shows up near the end of The Amazing World of Gumball episode "The DVD", during the scene where Gumball and Darwin are chased through the neighborhood by their mother. Gumball and Darwin run away from it. Nicole starts riding it like a horse. The dog in question looks like Domo, but quadrupedal with a tail and ears. This is used as a generic "dog" model throughout the show, including one time Gumball had to cartwheel through a yard full of them and another where he chains one up in his yard to make his house look bad.
• In Batman Beyond, Bruce Wayne has a Great Dane named Ace (not the Bat-Hound, but undoubtedly a Mythology Gag) who was actually raised for dogfighting and rescued by Bruce.
• The Doberman at the dog pound in Chip 'n Dale: Rescue Rangers, episode "To the Rescue" part 4.
• The 1963 Daffy Duck cartoon Fast Buck Duck involved Daffy trying to contact a millionare, and having to make it past the man's pet bulldog first. Daffy faced a similar situation in the 1948 cartoon "Daffy Dilly", but in "Dilly" the obstacle was the millionare's anthropomorphic dog butler.
• Doug had an episode involving the "classic" version, a bulldog who was preventing Doug and Skeeter from getting a (borrowed and presumably expensive) frisbee out of a yard.
• Taken to absurd lengths in Eek! The Cat, where the neighbors' yard is guarded by Sharky the Sharkdog, who is a literal shark/dog hybrid. Sharky would often go out of his way to terrorize the well-intentioned Eek!, regardless of where they were. Leading to the classic episode involving Annabel's pool in the backyard, a submarine full of ocean-exploring waterfowl parodying Jacques Cousteau, and the "Shark" part of things suddenly being much more literal.
• El Tigre: The Adventures of Manny Rivera: Chief Suarez owns a pair of Dobermans, who would normally be Heroic Dogs if it wasn't for the fact that Suarez hates Manny for getting Frida involved in super-crimefighting, and the dogs' attitude towards Manny reflects that.
• The Fairly OddParents!:
  • Timmy's ploy of getting friends Chester and A.J. to rescue him from "vicious guard dogs" backfires when Cosmo and Wanda are too distracted to play the part, and the junkyard's actual vicious guard dogs go after Timmy instead.
  • Remy Buxaplenty's family owned some vicious guard dogs themselves (among them Pit Bulls).
  • Dr. Bender has one, complete with some Braces of Orthodontic Overkill.
• Foghorn Leghorn's nemesis Barnyard Dawg is one, but that's only because Foggy makes him angry all the time.
• Garfield and Friends had Garfield citing the Angry Guard Dog as an especially annoying trope, since he never understood why a dog would automatically defend a mouse or immediately attack a cat for no reason. (Garfield thinks that dogs are ruled by their stupid instincts. Garfield himself does run afoul of dogs occasionally, but it's usually after baiting them.)
• Bronx from Gargoyles is both this and a Big Friendly Dog, depending on situation or who is around.
• The only person who can keep The Grim Reaper's dog Cerberus in check is Mandy. She could send the dog in the photo image up top running for his dog house.
• Professor Rockabuilt's guard dog in The Hair Bear Bunch episode "No Space Like Home" becomes a sudden subversion when he himself is barked at. He runs off cowering.
  Hair Bear: That dog has a deep psychological problem.
  Square Bear: Yeah, I'd hate to be his psychiatrist. He'd rip the couch apart.
• The Looney Tunes "Sam the Sheepdog" cartoons subverted this; Sam protects the sheep but has no personal animosity toward the wolf, as a Punch Clock Hero — in one, we see them both punching out mid-fight, having lunch, and getting back into position afterwards.
• Los Trotamúsicos: Attila is the guard dog of the three robbers in this adaptation of The Bremen Town Musicians, but generally a very weak and incompetent dog.
• Mr. Bogus:
  • In the second act of the episode "Museum Madness", Bogus finds himself getting chased by a security guard's Doberman throughout the museum.
  • An Angry Guard Dog rottweiler served as The Dragon to Ratty in the first act of the episode "Totally Bogus Video". Too bad that he only showed up in the first act.
• Cerberus comes to visit Ponyville in an episode of My Little Pony: Friendship Is Magic. It's placated by Fluttershy.
  Fluttershy: Who's the cute little three-headed dog? Who's a good boy? Who's a good boy?
• Oggy and the Cockroaches: Bob. In a few episodes, he actually IS a guard.
• The earliest example might be in Oswald the Lucky Rabbit, episode "Weary Willies" (1929), with hobos Oswald and Pete trying to get a roasted turkey off of a suburban windowsill. Blocking the way is a fierce bulldog who, after several typical blackout gags, is ultimately sent chasing after the cop who'd been pursuing Oswald and Pete for vagrancy earlier. Remade by Yogi Bear as Pie Pirates (1959), with a few gags reused verbatim, and lampooned by The Ren & Stimpy Show (see below) decades later.
• The Pink Panther has come across a few such dogs in a fenced yard, such as in "The Pink Package Plot" (a terrorist was forcing the Panther to deliver a package containing a Time Bomb to an estate) and "Spark Plug Pink" (where a spark plug the Panther needs to get his lawn mower going accidentally lands in the dog's yard amongst his bones).
• The Slimer! segments of The Real Ghostbusters frequently had Slimer having to get past an aggressive guard dog named Bruiser.
• ReBoot has Frisket, a super strong dog that only listened to Enzo. He absolutely hated Bob, which is used as a Call-Back when Bob returns from the Web. Frisket sees a "stranger" and growls, then sniffs and learns it is Bob, then goes back to growling.
• The Ren & Stimpy Show played with this in "A Yard Too Far". After Ren (himself an Angry Guard Dog in the series) realizes that attempts by him and Stimpy to steal food from a windowsill are too similar to a golden-age cartoon plot for his comfort, he immediately sends Stimpy (a cat) to scout and flush out the obligatory guard dog. Stimpy returns and assures him there is no dog. Ren goes into the yard, and is promptly mauled by a guard baboon.
• The Pickles live next door to one such dog on Rugrats, often mentioned but only seen twice — three times if you count the Whole Episode Flashback before it became the ferocious "monster dog" the babies had come to know.
• The Secret World of Benjamin Bear: The Biggleboar family has Chomper, a vicious Doberman Pinscher who doesn't like Benjamin or Howie.
• The Simpsons:
  • Mr. Burns has a pack of these at the ready whenever his guests have overstayed their welcome. Or if he needs a good chuckle.
    Burns: Smithers, release the hounds!
  • Although they do get old and tired, leading Burns to reminisce about one dog's attack on his first hippie:
    Burns: That hippie didn't think that was too grooovy.
• SpongeBob SquarePants once had to get past a vicious junkyard guard worm, giant worms being the "underwater" equivalent of dogs.
• Stoppit and Tidyup has nasty little Not Now, who is a small yappy one for the big bad I Said No.
• On one Sylvester the Cat and Tweety Bird cartoon, Granny seems to have hundreds of guard dogs in her backyard, all of which Sylvester has to get through to catch Tweety.
  • The guard dog design used in the short was also made into a single recurring character who often antagonised Sylvester (named Hector in later media). Incidentally Hector's design was also reused as Marc Anthony in Marc Anthony And Pussyfoot series, who, despite his best attempts, is anything but.
• Arnold the security dog from Tiny Toon Adventures.
• Tom and Jerry: The most famous example is probably Spike the Bulldog from these cartoon shorts. When Spike's popularity caused a softening of the character, the writers merely gave him other reasons to attack Tom (a misunderstanding, trying to set an example to his son about how dogs act, a Papa Wolf attitude toward those messing with said son, etc.)
• In the We Bare Bears episode "The Demon", the titular "demon" is the dog of Chloe's neighbor, a crazed monster that rips to shreds anything it gets a hold of. It also turns out to be a tiny French Bulldog, albeit a savage, hyperactive one. She and Ice Bear sneak in when the dog gets her hoodie. In the end, they discover that wearing the hoodie calms it down, so they let him have it, much to the delight of the neighbor.