Hello, everyone! I just wanted to see the BEST ways to know if my guinea pig is happy or not. I've had him for about a week now,and he's been acting pretty happy to me. But sometimes he just runs away or hides in his cardboard tunnel. Whenever I try to come in and talk to him. So I just wanted a few pointers on how to get him to love me. And Wheek when I come on the room.