why is my dog throwing up yellow

Dogs typically vomit yellow due to bile, a digestive fluid produced by the liver and stored in the gallbladder. The most common reason for yellow vomiting is an empty stomach, where bile irritates the stomach lining and causes vomiting. This often happens early in the morning or after extended periods without eating. Other potential causes include bilious vomiting syndrome (BVS), gastrointestinal irritation or inflammation (such as gastritis, pancreatitis, or inflammatory bowel disease), ingestion of toxins or indigestible materials, gastrointestinal blockages, acid reflux, or underlying health conditions like liver problems. If the vomiting is occasional and your dog acts normally otherwise, it may be related to an empty stomach. However, repeated vomiting, lethargy, lack of appetite, or other concerning signs warrant a veterinary evaluation.