You do it almost every day: you take your dog for a walk, he sniffs, explores, and at some point he stops and starts eating grass with absolute concentration.

And immediately the thought pops up: "Is he sick? Does he want to vomit?"

It's one of the most common myths among dog owners. In reality, studies show that only 25% of dogs that eat grass vomit afterwards. It's not the rule — it's the exception. Most dogs eat grass, are perfectly fine, and continue their walk as if nothing happened.

The real explanation is much more interesting than we think.

It's a normal — and very ancient — behavior

First of all, something important: eating grass is a common and documented behavior in dogs of all breeds, ages, and lifestyles. It's not a peculiarity of your particular dog.

Dogs are omnivores by nature. Their wild ancestors hunted whole prey and, with them, also ingested the vegetable contents of the herbivores' stomachs. Grass, fibers, plant metabolites were naturally part of their diet for millennia.

The modern dog no longer hunts — but that behavior remains encoded in its DNA. Eating grass during a walk is not a sign of illness: it's a perfectly normal ancestral instinct, passed down from generation to generation.

The 4 main reasons why dogs eat grass

1. Their stomach bothers them

This is the most frequent explanation. When a dog has digestive difficulties — has eaten too quickly, has swallowed something that doesn't agree with them, or has a heavy stomach — they instinctively seek out grass to induce a gastric reaction.

Grass blades, once ingested, irritate the stomach lining and stimulate the gag reflex. It's a natural cleaning mechanism: the body uses what it finds in nature to rid itself of something that shouldn't be there.

If your dog eats grass and then vomits once, and immediately afterwards returns to being cheerful and normal, there's no cause for alarm. He did exactly what he needed to do.

2. They instinctively supplement their diet

Dogs have a surprising ability: that of selecting plants according to their needs. Grass contains fiber, folic acid, and minerals that the body may actively seek when the diet is deficient. It's not random behavior — it's instinctive self-medication.

Ethological studies have documented that dogs do not eat grass randomly: they tend to choose specific species, varying according to the moment and physical state. Some grasses stimulate intestinal motility, others have anti-inflammatory or antiparasitic properties.

The dog's body knows what it wants — and goes looking for it.

This tells us something important: animals have a deep and instinctive relationship with nature. They recognize what is natural. And that's exactly why at ShizenPet we only use ingredients that the body already knows — pure botanical oils, ionized bicarbonate, water. Nothing artificial. Nothing the body has to "accept" as foreign.

3. They simply enjoy it

Not everything has a medical explanation. Sometimes dogs eat grass because fresh grass has a taste and texture they enjoy — aromatic, juicy, stimulating to the taste buds.

Just as we have taste preferences that don't always have a nutritional logic, dogs can also have theirs. If the behavior is occasional and not followed by vomiting or discomfort, it's simply part of their way of exploring the world.

4. Boredom, stress, or anxiety

The fourth reason is behavioral. Chewing is an action that releases tension in dogs — it stimulates the production of endorphins and provides a feeling of calm and contentment.

A dog that is bored, anxious, or in need of more stimulation might use eating grass as an outlet. In this case, the behavior itself isn't the problem, but the emotional signal it hides: the dog is asking for more attention, more activity, more engagement.

When you should worry

Occasional behavior doesn't require any intervention. However, there are situations where it's worth contacting the veterinarian:

• Vomiting repeats multiple times on the same day, or for several consecutive days
• The dog vomits white foam or yellowish liquid
• After eating grass, they appear lethargic, lose their appetite, or show abdominal pain
• The behavior has become compulsive and repeats every time they go out

In these cases, eating grass could be a symptom of something that requires a veterinary diagnosis — gastric, hepatic, or pancreatic problems that only a professional can evaluate.

Be careful what grass they eat

Not all grass is safe. This is perhaps the most important point of the entire issue.

Plants toxic to dogs — always to be avoided: Aloe vera, azalea, oleander, wisteria, iris, tulip, holly, mistletoe, cyclamen, poinsettia. If your dog frequents gardens or green areas where these plants grow, keep an eye on them.

Grass treated with pesticides and fertilizers — a real risk in urban parks and private gardens. If you don't know if an area is treated, it's best to discourage ingestion.

Larvae and parasites — grass can harbor eggs and larvae laid by other animals, invisible to the naked eye. Regular antiparasitic treatment, agreed upon with the veterinarian, is the most effective prevention.

After the walk: what remains on the fur

There's an aspect that is often overlooked: when a dog rolls on the grass, lies down, or walks in green areas, they bring home much more than what they ate. Pollen, spores, dirt residue, any traces of pesticides — everything settles on the fur, particularly on the paws and belly.

A post-walk grooming routine makes a difference, especially in the spring and summer months

when the grass is taller and environmental substances are more concentrated.

The ShizenPet Dry Shampoo applied to the paws and belly after the walk removes superficial dirt and neutralizes odors without rinsing. For the paws in particular, simply spray it on a cloth and wipe gently — quick, effective, and stress-free for the dog.

Conclusion: the body knows what it's doing

A dog eating grass is exercising an instinct that comes from afar — from the same nature that gave him a nose capable of detecting what we don't even perceive.

Observe him. Understand if it's occasional or systematic behavior, if it's followed by well-being or discomfort. Your dog communicates continuously — even through what he chooses to eat during his walk.

Animals' bodies have a deep relationship with nature. They recognize what is natural. They reject what is not.

Nature already knows. We follow it. 🌿

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