If you own a large-breed dog, this is the emergency I'd most want you to recognise at 2am. Bloat, also called GDV, can kill a healthy adult dog in hours. The stomach fills with gas and twists on itself, cutting off the blood supply. The four signs to burn into memory: • A swollen, tight, distended belly • Unproductive retching and excessive drooling (trying to be sick with nothing coming up, the single most important red flag) • Restlessness, pacing, inability to settle • Collapse If any of thes