My Dog Always Hacks After Drinking Water. Reasons why dogs hack after drinking water. A dog gulping his water rapidly could end up vomiting it, especially if his stomach is empty.
While any variety of dog can suffer from this condition, the brachycephalic breeds are more prone to tracheal collapse. If a dog coughs after drinking water, especially if that dog is a young puppy, it could signal a more serious health. If a dog is always coughing after drinking water, the chances are good that something is wrong with its trachea, which some people might be more familiar with under the name of windpipe.