Why Is My Dog Sick? Vomiting in Dogs and When to Call the Vet
. Updated September 2026 Dogs can vomit for lots of reasons. Sometimes it is a short-lived stomach upset after eating something unusual, but vomiting can also signal poisoning, a blockage, pancreatitis, infection, heatstroke, or another illness. If your normally healthy adult dog has been sick once but is bright, comfortable and behaving normally, you may…