Gaming time help?

Okay so I'm currently playing this harvest moon game called: Rune Factory 3: a fantasy harvest moon (way to go in revolutionize harvest moon since its traditionally a farming game only and now it's a monster quest role playing game with actual quests instead of heart events etc.) it gets better once you play it. I was wondering, for those who played it or have knowledge about the game, what does it mean if your befriended pet monster who follows you around has a dialogue with a treasure chest above its head mean? When I tried to talk to it nothing happens. And it disappears when I go inside my home and go back out. I reload the saved game or state and when I teleport to the outside of my house and while walking to the stairs or bridge it shows up, but you can't get it is it telling me something? Or did anyone have this experience? Picture below: 

It's a wooly monster (named it kyo) and it has a blinking/moving dialogue circle with a treasure chest. Comments pls!!!