Eating grass is normal behavior for many dogs, especially if they occasionally bite some grass during walks or in the yard. This is usually not a cause for concern.
However, if your dog is actively seeking grass and grazing almost like a cow, this may indicate underlying stomach problems, especially if it is accompanied by vomiting. In that case, consider dividing meals into smaller portions throughout the day to relieve the stomach.
However, if your dog is frequently eating grass and losing his appetite or vomiting frequently, it is always recommended to have this examined by a veterinarian, as this behavior may be caused by underlying conditions that may require medical treatment.²²