The ML is so unhinged haha what are you saying to a PUPPY ╥﹏╥

Previous chapter revealed he already knows this is not a dog but another shapeshifter he's dealing with. ^^

so did the ml liked him from since then? or just playing with him?

That remains to be seen.
So far they don't really know anything about each other (personality, likes, dislikes, etc.). So I suppose the only factors that he can like so far are the dog's looks, the feisty moment he saw of him that one time and his scent. Nothing else is given so far.