Don't exercise your dog during the hottest part of the day and make sure your dog has a cool shady spot in your yard if you leave it outside. Symptoms of heat stress can include panting, extreme agitated behavior, foaming at the mouth and vomiting. It could even send your dog into a coma. If you think your dog might be suffering from heat stress, wrap it in cool, damp towels and bring it to your vet immediately. This is a condition most commonly brought on by overeating or being overly active after eating too much.
Any dog can bloat, but it's common in larger breeds of dogs, especially deep chested ones.
Older dogs are more at risk. When dogs bloat, their stomach expands rapidly. Torsion twist is a condition where the stomach actually twists over and twists itself shut at each end. Symptoms of bloat or torsion twist include an unusually large or hard abdomen, vomiting or a change in your dog's body language or how they are behaving towards you. They might try to defecate, whine, pace, or simply look pathetic to try to tell you about their distress.