Grass eating is very common among dogs and considered a normal behavior. Plant eating has also been observed in wolves and other wild canids. But what are the reasons behind it? When could it be a cause for concern?
Some common reasons that have been suggested about why dogs eat grass
- They are bored
Dogs need mental stimulation. If they’re left alone or under-exercised, they may chew grass simply to pass the time or get your attention. - Possible fiber deficiency
Grass contains roughage, and dogs may seek it out if their diet lacks fiber. This is sometimes seen in dogs on grain-free diets. It could also be a sign of hunger. - Feeling Unwell
Dogs may eat grass when they feel ill as it can help induce vomiting, providing relief from nausea and gastrointestinal discomfort. Eating grass is also thought to help dogs expel parasites by aiding their passage through the digestive tract. - Pain or Discomfort
Dogs often mask pain. A sudden change in their behavior—like eating grass—could signal abdominal discomfort or another underlying issue. - Biological Directive?? Additionally, there may be an unknown biological purpose for grass eating that has yet to be discovered with more research!
Occasional grass eating is normal. And of course, don’t let your dog eat anything that has been treated with pesticides or fertilizers. But if your dog’s grass-eating becomes frequent or obsessive, you may want to try increasing fiber with high-fiber dog food or cooked veggies, providing more mental stimulation and enrichment with exercise, playtime and safe chew alternatives or puzzle toys.
Eating grass may be harmless—or it may be your dog’s way of telling you something’s off. Stay observant of changes in your dog’s demeanor and always consult your veterinarian when it comes to any changes in your dog’s health, diet and behavior.
References:
- Beynen, Anton. (2020). Beynen AC, 2020. Diet and grass eating in dogs. 89-94.
- Sueda, K. C., B. L. Hart, and K. D. Cliff. “Plant Eating in Domestic Dogs (Canis familiaris): Characterization and Relationship to Signalment, Illness, and Behavior Problems.” Current Issues and Research in Veterinary Behavioral Medicine (2005): 230.
- S.J. Bjone1,2, W.Y. Brown3 and I.R. Price1 1University of New England, School of Psychology, Armidale, New South Wales, 2351 (2007), Australia; 2 sbjone@une.edu.au; University of New England, Animal Science, Armidale, New South Wales, 2351, Australia
Naomi Soffa is a certified Veterinary Assistant as well as a University of Washington-certified Animal Behaviorist. She is a longtime volunteer at several animal shelters and rescue organizations around the San Francisco Bay Area. Naomi is also the proud mom of a rescue pet and avid animal lover.
