This would appear as a bloated or distended abdomen due to inappropriate fluid retention. (cccvetservice.com)
The presence of a rapidly developing distended abdomen in a large breed dog is enough evidence to make a tentative diagnosis of GDV. (homevet.com)
If you notice your dog gagging, trying unsuccessfully to vomit, displaying strings of saliva hanging from the mouth, and showing signs of distended abdomen, call your veterinarian immediately. (cesarsway.com)