So I am marrying Kana, and I have to get dirk up to four flowers for the yellow heart event. Which is a load of « Puppy Doodoo ». Does he like eggs? I give him eggs and he says "Sweet Thanks."...but is it doing any good? I know he likes tea but the tea house isn't selling it.
Depending which season you're in, you could try giving him beetles. That's how I did it. Doing his requests and talking to him every day, along with going on dates, will also help.