i understand why Mei's physical appearance gives it away that she's a mutant: her rabbit ears are drooped instead of perking up like the other rabbits (like her friend), she is tall like a cat instead of short and cute like the other rabbits (again, like her friend), she's probably tall because her mother is tiger (it says in the 1st chapter that cats are tall, and tiger is still a cat so)
but i don't understand how people instantly know June is a mutant? he looks like the other foxes. he looks like Jung Park 🤔