There are several reasons why dogs might eat grass, including:

Upset stomach: One of the most common reasons dogs eat grass is to relieve an upset stomach. Grass can help induce vomiting, which can help clear out any unwanted substances from the dog’s digestive system.

Nutritional deficiency: Dogs may eat grass if they are not getting enough nutrients in their diet. Grass can provide some of the vitamins and minerals that dogs need.

Boredom: Dogs may eat grass out of boredom or as a way to alleviate stress or anxiety.

Natural instinct: Dogs are descended from wolves, who would eat grass and other vegetation in the wild. It is possible that dogs have an innate instinct to eat grass.

Taste and texture: Some dogs simply enjoy the taste and texture of grass, and may eat it as a form of play or exploration. If your dog is eating grass frequently and excessively, it is a good idea to talk to your veterinarian to rule out any underlying health issues or nutritional deficiencies.