So just novels with wholesome interactions with animals. It can be any type of animals, whether it’s pets or wild animals. The animals should to be the main focus or the majority of the main focus. It doesn’t matter if it’s a novel about a totally platonic relationship with animals or if it’s romantic and the MC or their main love interest can somehow turn into an animal. I’m happy as long as the main focus is the animal/s and they have wholesome interactions. And it’s not horror.
It's not centered on pets, but the pets are particularly important/memorable characters. Read up through chapter 12 to see what I mean. I Became Hugely Popular After Becoming a Cannon Fodder Star