Loyalty to the "pack" versus individual desire.

Does the character see themselves as an animal first, or a person in love? Belonging: Finding someone who accepts your "wild" side.

This is common in werewolf or shapeshifter stories (like Twilight or Wolfwalkers ).

How do different species/animals express affection? (Tail wagging, purring, or specific rituals).

In stories like Beastars or Zootopia , romantic tension is built around the species of the characters. A "Predator and Prey" romance.

A Golden Retriever "jock" dating a Black Cat "introvert."