For many dogs, grass tastes great. It’s been part of their diet for thousands of years.
Energetic, playful dogs seem to eat grass without issue. Dogs who may be sick eat grass to stimulate vomiting. And then there are dogs who just love the taste so much, the post vomiting doesn’t matter.
We really don’t know why this happens. Eating grass is normal.
Just make sure your dog only eats organic grass. No pesticides!