Child of Two Worlds: In the end, Cha Sui learns to be content that he is both a "cat" who can bark and a dog who (with the Miao Siblings' tutelage) knows how to climb trees.
Happily Adopted: Cha Sui is very happy to have a family, to the point he doesn't mind (or possibly even know) he's a different species than them.
Interspecies Adoption: Cha Sui is a dog. His adoptive parents are cats. Despite being two different species, the latter happily adopted the former.
Karma Houdini: The Sleeve Dogs are never called out on the nasty, hurtful things they say to Cha Sui.
You Are Better Than You Think You Are: When Cha Sui is haunted by the Sleeve Dogs' words about how he's "nothing", he's conflicted of what he is if he's neither a true dog or a real cat. To this, Dongwa says "You're my cousin".
