Basic Trope: An otherwise completely anthropomorphic animal does something that reminds the audience what species he is.
Straight: Jeff, an Anthropomorphic Dog is hanging out with his human buddies when he suddenly drops everything to chase a cat.
Exageratted: Jeff a Sheepdog is driving his truck down a busy highway, when suddenly he spots a heard of sheep on the hillside, Jeff stops the truck and starts herding the sheep just as his ancestors have done for centuries.
Downplayed: Jeff is hanging out at the bar with his friends, halfway between sips of beer he pauses to scratch his ear with his hind foot.
Justified: Jeff may be more evolved than other dogs but he is still very much a dog and his instincts have a very strong hold on him
Inverted: A Wild Child, who acts like an animal most of the time, sits at a table once and eats off a plate.
Subverted: Jeff, an anthropomorphic dog, goes to chase a cat, but only to return it to it's proper owner.
Double Subverted: Immediately after, he goes chasing some strays just for fun.
Parodied: Jeff's urge to sniff people causes a blind date to end prematurely.
Averted: Jeff does absolutely nothing resembling dog behavior.
Enforced: "We need more comic relief. Have Jeff randomly start chasing a truck."
Lampshaded: "I almost forgot you were a dog."
Invoked: Jeff occasionally relapses into dog behavior as to not forget his roots.
Exploited: A character uses the sudden onset of dog behavior as a distraction, by suddenly throwing a ball into a crowd of people in plain view of the dog.
Defied: Jeff rejects all dog-like behavior to be accepted in human society.
Discussed: "I don't know what you just said because I was watching that ball in your hand. I can't stand it. Aren't you going to throw it?! If you don't, I might go randomly tearing off and chasing a car!"
Deconstructed: The constant descent into animal instinct leads to tragedy for the entire species (or the single member shown to act this way) due to hatred and fear against them - after all, if they will randomly start chasing a ball, they'll also hunt things smaller than them, as well as bite if improperly socialized or threatened. People are unsettled and afraid around creatures prone to random attacks of animal-like behavior.
Reconstructed: The search for self-mastery of one's instincts is a common theme. "I am the master of the ball, not it's servant. I. Will. Not. Chase. It."