Dogs eat grass for several possible reasons, including instinct, dietary needs, boredom, or to aid digestion. It may be an instinctive behavior inherited from their wild ancestors, who sometimes consumed plants. Dogs might also eat grass to get more fiber, which helps move food through their digestive system. Some dogs seem to eat grass because they like the taste or texture, especially in certain seasons. While there is a common belief dogs eat grass to make themselves vomit when feeling sick, research shows that most dogs are not sick before eating grass, and only some vomit afterward. Boredom or a need for mental stimulation can also lead dogs to eat grass. If the grass-eating is excessive or accompanied by issues like vomiting, changes in appetite, or digestion, a veterinary check-up is advised to rule out underlying health problems or nutritional deficiencies.