Eating Grass: Normal or Abnormal?

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Dr. Nancy Kay, DVMDr. Nancy Kay, DVM, has written an informative article on a common concern of many pet owners-Is eating grass normal or not? She combines her experience as a veterinarian and an author to clearly explain this phenomenon to pet owners.

Eating Grass: Normal or Abnormal?

Does your cat or dog like to eat grass? If so, you may be wondering if this is normal or abnormal behavior. Either conclusion may be accurate, depending on the individual animal.

Some dogs and cats are natural born grazers. They seemingly love the taste and texture of grass. Given the opportunity, they will eat some daily without any apparent ill effects, and it is fine to let them do so. Perhaps they were cows in a previous lifetime!

For others, foraging on vegetation (grass, leaves, twigs) is a response to an underlying gastrointestinal upset. These dogs and cats typically have other symptoms such as loss of appetite, lethargy, vomiting, and/or diarrhea. Eating grass may actually induce vomiting, which, from the animal’s perspective, may be the desired effect. If your pet who normally ignores grass is suddenly ravenous for the stuff, a visit with your veterinarian is recommended.

Some overtly healthy appearing dogs and cats vomit only when they eat grass. This suggests an underlying allergy or sensitivity to such greenery, and, for these animals, grazing should be prevented.

Grazing Do’s and Don’ts

– Grazing is fine as long as your pet is overtly healthy, and eating grass does not cause vomiting or abdominal discomfort.

– Don’t let your pet graze where pesticides may have been applied. There is a known correlation between ingestion of pesticides and the development of certain types of cancers. If in doubt, keep your pet out.

– Avoid allowing your pet to graze where fertilizer has been recently applied.

– Don’t allow grazing if foxtails are present. This grassy plant grows in abundance west of the Mississippi. The foxtail heads are barbed, and can readily become lodged within an animal’s throat.

– Consider growing “cat grass” for your strictly indoor kitties. This feline treat can be purchased at most pet stores.

Do you happen to have a grazer in your household?

Best wishes,

Nancy Kay, DVM

Diplomate, American College of Veterinary Internal Medicine
Author of Speaking for Spot: Be the Advocate Your Dog Needs to Live a Happy, Healthy, Longer Life
Author of Your Dog’s Best Health: A Dozen Reasonable Things to Expect From Your Vet
Recipient, Leo K. Bustad Companion Animal Veterinarian of the Year Award
Recipient, American Animal Hospital Association Animal Welfare and Humane Ethics Award
Recipient, Dog Writers Association of America Award for Best Blog
Recipient, Eukanuba Canine Health Award
Recipient, AKC Club Publication Excellence Award
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Please visit to read excerpts from Speaking for Spot and Your Dog’s Best Health.   There you will also find “Advocacy Aids”- helpful health forms you can download and use for your own dog, and a collection of published articles on advocating for your pet’s health. Speaking for Spot and Your Dog’s Best Health are available at,, local bookstores, and your favorite online book seller.

This article was originally posted on the Speaking for Spot Blog. Click here to view the original.