My guinea pig Fluffy had just died ue to unknown reasons, leaving my other guinea Furry, alone. I'm scared that Furry will feel lonely, but he doesn't seem to have any issues. I'm confused as to how my guinea is feeling, and if Furry is actually ok, or is just hiding it. He seems to be less active though, and it's beginning to worry me. He also started biting at bars and nibbling on fingers even though he rarely did that. I'm not sure what to do.