In this context, the consumption of grass and other vegetation was not only common but perhaps essential for survival. While the domestic dog's diet takes a meat-first approach, evolutionary echoes of their ancestors can manifest as occasional grass consumption in modern-day pups.
Psychological reasons. Puppies and younger dogs often nibble on grass as a way to relieve boredom. A stressed or anxious pup will also eat grass. If you suspect this to be the case, take a step back and assess your dogs lifestyle.

Sudden, intense increase in grass consumption. Compulsive grass eating that can't be interrupted. Weight loss despite normal eating habits. Signs of abdominal pain (hunched posture, whining when touched). Pay particular attention to changes in your dog's grass-eating behavior.

Physical Reasons for Grass Consumption in Dogs. As pet owners, its natural to worry about our furry companions and their eating habits, including concerns about why is my dog eating grass.

Such details provide a deeper understanding and appreciation for Grass Consumption In Puppies.
Selective consumption: Normal grass-eating dogs often show preferences for specific types of grass, typically choosing young, tender shoots over mature, tough grass. This selectivity suggests that dogs can distinguish between grasses with different nutritional profiles and palatability.
Constipation due to excessive grass consumption. If your dog eats too much grass, gastrointestinal problems will occur. In particular, constipation is strongly represented here. When consumed in excess, the stomach no longer properly digests the grass and other food.