That a dog vomits can be due to several things, from indigestion to something more serious. If it contains blood or is accompanied by diarrhea, you should go to the vet. But when it is not about those?
The first thing you should know is that regurgitation and vomiting is not the same thing. If your dog expels the whole food and you can differentiate the components of it, the food has not been in his stomach for a long time and therefore it is about regurgitation. This usually happens when the dog has eaten too fast or has eaten too much. However, in other cases, it can be caused by problems in the esophagus or pharynx, so the consultation with the veterinarian is more than advisable.
If the food is accompanied by bile, then it is considered vomit. Dogs vomit for various reasons but it is a fairly common symptom of some diseases. It can be due to gastritis, intoxication, or a problem of pancreas, kidney, or liver.
The color of the vomit can give us some clue about its origin:
The most common causes are indigestion or excessive exercises after a meal. Gastric dilatation-volvulus (GDV) is also one of the potential causes if the dog is vomiting white foam and/or seems like he’s trying to vomit but can’t. It is a rare but potentially life-threatening condition in which the stomach dilates and twists on itself.
A symptom of acidity in the stomach, common in dogs that do not take adequate food.
Generally due to the intake of grass, although it can also be gastritis or an allergy.
As in the previous cases, it may be due to indigestion, gastritis, or by coprophagia (stools intake), a very common problem in puppies.
The tone indicates the presence of blood, which can happen with any irritation of the lining of the stomach or esophagus.