My thoughts exactly
I'm more into no.2 cause would he tell him the puppy likes shrimps and ask the other person about his info so that's a giveaway
Right? He definitely knows it's him. I don't think that author is trying to keep it a secret either. I also think that he can understand him too. And if that's the case, I can't wait for the pup to realize it and just poof! into a cloud of embarrassment!
Yeah idk when he found out but like the puppy able to quickly react to the other MC is kinda sus so that's also maybe how he knew
1 the puppys hyung probably intended the incident to happen to prolong the payment of the debt and blame it on the puppy for stealing the money
2 the wolf mc probably knows the puppy is him