GDV is a condition that most often occurs in large breed, deep-chested dogs and only rarely in small to medium breed dogs. With GDV you will typically see them trying to vomit but nothing comes out. They can breathe heavily, be weak and collapse. I think is it unlikely that Diamond has GDV. She could be bloated and gassy from eating too much or eating something she's not used to having. You could try fasting her overnight and then give her a bland diet of plain boiled chicken and rice in the morning and see if that helps. If she continues to be gassy and bloated and especially if she develops vomiting, diarrhea, lethargy or poor appetite, I would take her to your veterinarian for further evaluation.