Eating grass is normal behavior for many dogs, especially if they occasionally nibble on some grass during walks or in the garden. This is usually not a cause for concern.
However, if your dog actively seeks out grass and almost grazes like a cow, this may indicate underlying stomach issues, especially if it is accompanied by vomiting. In that case, you may consider splitting meals into smaller portions throughout the day to reduce the burden on the stomach.
If your dog frequently eats grass and loses its appetite or vomits often, it is always recommended to have this checked by a veterinarian, as this behavior may be caused by underlying conditions that could require medical treatment.