2. Soothing an Upset Stomach

One of the main reasons cats eat grass is because they instinctively know they can't digest it and that it will make them vomit. If a cat has an upset stomach, it may have ingested a poison or eaten something it can't digest. For a wild cat without human assistance, vomiting is often the safest course of action. Eating grass can trigger that reflex and get the offending substance out of the cat's stomach.

Close-up of unhappy tortoiseshell cat michellegibson / Getty Images

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