With some animal characters, an Anthropomorphic Shift occurs as they grow and develop. Often, they grow more anthropomorphic, but sometimes the inverse can occur. If the animal character is a Petting Zoo Person to begin with, then they become more distinctly anthropomorphic as they grow and develop.
With female characters that become more anthropomorphic as they grow, they often develop Non-Mammal Mammaries.
- Inverted with the Tyrannosaurus rex and Daspletosaurus in Dinosaur Train; adult ones stand more like their real counterparts, but juvenile ones stand more upright and have plantigrade feet.
- Baby Lola Bunny in Baby Looney Tunes is a Funny Animal like the rest of the animal characters, but adult Lola is a Petting Zoo Person.
- A Flash Back in the Heathcliff and The Catillac Cats episode, "Debutante Ball" shows Cleo and her friend Muffy as non-anthro kittens... with Cleo still sporting her full head of blonde hair.