Idk what else to call them, but a gong who is agressive to others but acts like a puppy when around the MC is my all time favorite gong(especially when it's a world where people have animal features and he always wags his tall around the MC) I just read read a novel with a dragon gong like this so I want to read more. The setting doesn't matter, and neither does the mcs personality(although I usually see a more mature mc or one that does show his emotions as much paired with this type of gong).
I would really recommend: Pulling Together a Villain Reformation Strategy, although there are no animal features. The interactions between the MC and ML are fantastic.
Puppy gongs are also my fav. The General’s Vampire Omega (MCs IQ is impaired, but wolf ML is a treat) Please Wait Until Spring (Technically a bear, but definitely puppy vibes) Surprise! The Supposed Talent Show Was Actually–?! (Borders on Cold CEO ML, but I'd say it's like a German Pinscher sort of puppy. He's obviously besotted and not just indulgently doting. Great plot twist too) The Virtuous Omega Disguised as the Vicious Colonel (Total power couple. This ML is definitely a more sociable sort of puppy. Not quite so territorial, but then again who would want his kitty besides himself?) A Real Man Isn’t Afraid of a Little Demon (This one is definitely a herding dog. Insists the cat joins his pack for his own good.)