My indoor cat, Mittens, seems obsessed with eating grass whenever I let her outside. She’ll ignore her toys and even treats to munch on the lawn. I’ve heard some cats eat grass to induce vomiting, but she doesn’t always throw up afterward. Is it normal for cats to eat grass, and if so, why is Mittens doing it? Could it be a sign of a dietary deficiency, or is she just bored? Should I be worried about her eating grass that might have been treated with pesticides or herbicides by my neighbors, and what can I do to safely satisfy her apparent craving for greens?
Answer
Cats eat grass for a variety of reasons, and the exact reason can vary from cat to cat. Here’s a breakdown of the most common explanations:
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Aiding Digestion: The most widely accepted theory is that cats eat grass to help them digest food and eliminate indigestible materials, such as fur, feathers, or bones. Grass acts as a source of fiber, which can help to move things along in the digestive tract and relieve constipation. The blades of grass can also stimulate the vomiting reflex, allowing the cat to expel hairballs and other irritants from their stomach.
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Nutrient Deficiency: Although cats are primarily carnivores, they may instinctively seek out plant matter, including grass, to supplement their diet. Grass contains small amounts of nutrients, such as folic acid (vitamin B9), which is essential for various bodily functions, including DNA synthesis and red blood cell production. A deficiency in folic acid can lead to anemia. While commercial cat foods are typically formulated to provide adequate nutrition, some cats may still feel the urge to supplement their diet with grass.
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Natural Instinct: Eating grass could be an instinctual behavior inherited from their wild ancestors. Wild cats often consume the entire prey animal, including the stomach contents, which may contain partially digested plant matter. This provided them with essential nutrients and fiber. Even though domesticated cats are fed commercially prepared food, the instinct to consume plant matter may still be present.
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Relieving Upset Stomach: If a cat has an upset stomach due to eating something spoiled or otherwise irritating, grass can help soothe the digestive tract. It might act as a mild laxative or absorbent, helping to clear out the irritating substance. Vomiting induced by the grass can also provide relief.
- Because They Like It: Some cats simply enjoy the taste and texture of grass. They might nibble on it out of curiosity or boredom. This is especially likely if the cat doesn’t experience any negative side effects from eating grass.
It is important to note that while eating grass is generally considered normal behavior for cats, it can also be a sign of an underlying health problem. If your cat is eating grass excessively, is vomiting frequently after eating grass, or is showing other signs of illness, such as loss of appetite, lethargy, or diarrhea, it’s best to consult with a veterinarian to rule out any medical conditions.