So why do dogs eat grass?

There is a lot of debate about why dogs eat grass and then like to vomit.
One theory is that the dog may have an upset stomach, so he will eat grass leaves, which will stimulate the digestive system and cause vomiting.
Another theory is that these dogs eat grass to imitate the "nutritional feeding behavior" of their ancestors. After hunting, the ancestors of dogs would eat the stomachs of herbivores and their stomach contents together. It is a means of supplementing plant fiber and vitamins.
The third theory is that dogs do this because it is fun for them and is an easy and safe way to play.

But be aware that vomiting after eating grass may also be due to parasitic infection.

The grass in the field is likely to be contaminated with parasite eggs, thereby infecting dogs with grass-eating behavior , causing vomiting and diarrhea. If your dog has been vomiting frequently recently, it is best to schedule a health check with your veterinarian to ensure there is no risk of parasitic infection.

There are no authoritative research results on why dogs eat grass. The above are some common opinions. Generally speaking, there is no obvious harm to dogs eating grass. However, if you are not sure about your dog’s vomiting behavior after eating grass, you can regularly Send your dog's fecal samples for examination. On the other hand, you can also feed your dog an appropriate amount of stomach health supplements to aid digestion.