Basic Trope: Female Funny Animals have long feminine human like hair.
Straight: Ruby the Rabbit has long human like hair that she wears in a pony tale. Her boyfriend Buck the Bunny just has a normal rabbit head.
Exaggerated: Every female animal has long luxurious hair, even birds, reptiles, amphibians, fish and insects.
Downplayed: Ruby just has a puffy tuft of hair on her head.
A bottle of experimental hair tonic was accidentally poured on top of her head.
Zelda the Zebra has an actual mane because she's a zebra and is supposed to have one. How she chooses to grow and style it is a personal preference.
Ruby the Rabbit looks just like any rabbit while the male of her species looked liked they have human like hair.
Everyone is bald, but the males have goatees.
Subverted: Ruby the Rabbit is actually just wearing a wig.
Double Subverted: ...but only to disguise herself. She actually has hair underneath.
Zig Zagged: Buck the Bunny sports a huge pompadour on his head. He claims it to be all natural but is actually just a wig.
Averted: Ruby the Rabbit looks just like any other rabbit.
Enforced: "Kids won't be able to tell if Ruby is a lady bunny like that. You gotta girl her up some more. Drawing a feminine hair on her head would do the trick."
Lampshaded: "A rabbit with a full head of hair. Weird."
Invoked: "There! You look almost like a lady now. All that's left is some long luxurious hair... I'll get the hair tonic."
Exploited: "Dammit I can't tell which one of you is which! Tell you guys what; Ruby, why don't you wear this pretty little wig right here."
Defied: "I refuse to wear such a silly thing on top of my head!"
Discussed: "The animal kingdom doesn't work like that Bob. They don't have long hair and pretty eyelashes."
Conversed: "Oh look another cartoon animal feminized by adding long hair. How original."
Implied: Long strands of hair dangle on top of Ruby the Rabbit's head. It seems to have been shaven recently.
Deconstructed: Ruby the Rabbit is alienated by her species because of her unnatural, unrabbit-like feature.
Reconstructed: Ruby the Rabbit was actually the next step in rabbit evolution and soon a whole generation was born just like her.
Played For Drama: Ruby the Rabbit thought that she could finally get Buck the Bunny to love her if she got a beautiful full head of hair just like what she sees from the humans but unfortunately when she finally achieved her dream it backfired; Buck was disgusted by how she looked and hopped away.