Yeah I was also confused but maybe it’s a representation that he’s turning more like a cat than a dog now?
I dunno but I’m still in the middle and had to rest for a while because I feel like there’s going to be a blow any time soon haha
The dog and cat are aspects of the MC’s identity. It is prevalent throughout the whole story. The whole story is about the MC finding who he wants to be. Either the loyal dog who obeys every command from the ML’s brother, or the lazy cat who indulges himself all day alongside the ML.
You can see MC struggling between these identities throughout the story. He was conditioned by the ML’s brother to be dutiful, loyal, and ascetic, which is why we see him organizing the house once he gets there, doing chores, getting a job, etc. The ML on the other hand didn’t expect anything from him. At some point, they begin to just sit around eat, drink, and have sex. Then again he returns to the ML’s brother. It’s simply a struggle for identity and autonomy. The dog and cat are just the MC’s conflicting identities. They’re fighting each other.
Literally just stayed up until 2 am to finish this. THIS WAS SO GOOD!!!! I thought that he was literally a half dog but it was just... uhh a saying? Idk how to phrase it. Also speaking of that, the way they executed the "dog" stuff felt underdeveloped because at first they were talking about how hes a dog and midway he suddenly becomes a "cat" and even does a cat cosplay at the end. Just a small thing I noticed but barely impacted the story tbh