In this guide, we explain the reasons why a dog may suddenly eat grass excessively and then vomit, what you can do and when to involve your veterinarian.
When your dog eats grass, the long strands of grass can irritate the stomach lining. The blades of grass can also make your dog gag. Both factors can stimulate your dog to vomit after eating grass.

Ingesting chemically treated grass can cause vomiting, increased drooling, and more serious reactions. Keep your dog off recently treated areas and watch for posted signage in parks and public spaces.

Furthermore, visual representations like the one above help us fully grasp the concept of Gauge Eating Grass Causing Vomiting.
Digestive Issues: Sometimes dogs eat grass to help induce vomiting if they have an upset stomach. Nutritional Deficiency: They might be trying to supplement their diet with nutrients they are lacking.

Physical Reasons Why Dogs Eat Grass. Is your dog eating grass to help with stomach upset? Experts believe that our canine companions sometimes eat grass to induce vomiting and, as a result, alleviate stomach upset. This is also an evolutionary thing...
Where it gets worth paying attention is when the grass eating is sudden, frantic, or happening alongside other symptoms like vomiting, lethargy or going off their food. On its own though, a bit of lawn nibbling is usually nothing to lose sleep over. Why Do Dogs Eat Grass?