Most dogs eat grass simply because it is in their nature, and in the vast majority of cases there is no cause for concern. It is one of the most widespread behaviours in dogs, and studies indicate that a large majority of healthy dogs occasionally grab a mouthful of grass without it being any sign that they are ill. When the question of why dogs eat grass nevertheless keeps coming up again and again, it is usually down to two things: that some dogs vomit afterwards, and that the owner wants to know whether the behaviour reflects a need that ought to be addressed.
The truth is that there is no single explanation. Grass eating can be about taste and texture, about curiosity, about boredom, about an instinctive heritage from the dog's ancestors, or about a temporary unease in the stomach. For you as an owner, the most important distinction is knowing the difference between the calm, contented grass eating that is part of everyday life, and the cases where the behaviour changes character and becomes eager, vomit-prone or sudden. Below we go through the most likely causes and give you a concrete basis for assessing your own dog's behaviour.
Is it normal for dogs to eat grass?
In short: yes. Grass eating is considered by most vets and behavioural researchers to be a completely normal part of a dog's life. It is neither a sign of a bad dog nor of a dog that is missing something crucial in its everyday life. Many dogs do it with obvious pleasure, calmly chewing on a few blades of grass during a walk and then moving on as if nothing had happened. That type of grass eating requires no intervention.
A persistent myth says that dogs always eat grass to induce vomiting and cleanse their stomach. That explanation does not hold up on closer inspection. The majority of dogs that eat grass seem completely healthy beforehand and do not vomit afterwards. Only a smaller proportion bring it back up after eating grass, which suggests that vomiting is most often a side effect rather than the actual purpose. In other words: your dog probably does not have a plan to feel better - it may simply enjoy eating grass.
The most likely explanations for grass eating
Instinct and heredity play a role. The dog's wild relatives did not only consume meat, but also the stomach contents of their prey, plants and other greenery they found along the way. This versatile eating behaviour is still present in the dog today, and a touch of plant eating is therefore a natural extension of what dogs have always done. For some dogs it is simply appealing to explore the world with their mouth, and fresh grass in the spring tastes and feels different from the rest of the year.
Taste, texture and curiosity are other weighty explanations. Newly sprouted grass has a sweetish, fresh character that many dogs clearly prefer, and the very sensation of chewing can be satisfying in itself. Finally, boredom and a lack of stimulation can lead a dog to start eating grass to have something to do. A dog with a high activity level that does not get an outlet for its energy may take to occupying itself with the lawn, and the same goes for a dog that is left alone for long periods. Here the solution is less about the food and more about enriching the dog's day with activity, training and shared experiences.
Does grass eating have anything to do with digestion?
Some dogs seek out grass when they have a slight unease in the stomach, and for the individual dog grass can sometimes be associated with a temporary stomach sensation. That does not mean that grass is a cure, and it also does not mean that a dog eating grass necessarily has a stomach ache. But if you find that your particular dog repeatedly vomits up grass or seems unsettled in its digestion, it may be worth looking at everyday routines and at the feeding itself.
A calm, well-balanced digestion begins at the bowl. At ESSENTIAL FOODS, all of our meals are prepared from fresh produce and human-grade ingredients, put together with care for the dog's wellbeing day after day. If your dog has a sensitive stomach, it may make sense to take a closer look at meals designed with gentle digestion in mind. In the Sensitive Stomach collection you will find relevant products gathered with the sensitive stomach in mind. If you are unsure whether a grain-free meal suits your dog's needs, you can explore our grain-free meals, which are composed entirely without grain. BALANCE is not among the grain-free meals, but is instead a meal that may be relevant if you are focusing on a sensitive stomach - it is important to keep the two things separate so that the choice suits your particular dog.
When should you react to your dog eating grass?
Although grass eating is essentially harmless, there are situations where you should pay attention. If the behaviour changes markedly and suddenly becomes very eager, if the dog repeatedly vomits, seems lethargic, loses its appetite or is otherwise not itself, then it is no longer just a question of taste and nature. In those cases it is wise to contact your vet, who can assess whether there is something behind the behaviour. We do not provide medical assessments here, precisely because such matters belong with the vet who knows your dog.
There is also a practical consideration regarding the grass itself. Lawns that have been sprayed with pesticides or fertilised with chemicals are not something your dog should eat from, and plants in the garden and on the walk can be poisonous to dogs. So keep an eye on where your dog grazes, and steer it away from areas you are not familiar with. If you would also like to give your dog something more meaningful to use its mouth and energy on, natural treats and a bit of brain exercise can often curb the urge to gnaw at the lawn. Our treats are prepared from select produce and are well suited both as a reward and for small breaks during the day.
Can you do anything about your dog's grass eating in everyday life?
If you would like to limit grass eating, it is rarely about forbidding it and much more about giving the dog better alternatives. A daily life with sufficient exercise, sniffing activity and mental occupation often removes the void that a bored dog fills with grass. Short training exercises on the walk, search games with treats and shared time with you make a noticeable difference, especially for dogs with lots of energy. For dogs with a more moderate everyday life, even small extra experiences can lift wellbeing and reduce the urge to graze.
The meal itself is also part of the picture. A dog that has its nutritional needs met through well-prepared dog meals has a good foundation for both energy and digestion. You are always welcome to draw on ESSENTIAL FOODS' nutrition advisers if you want to discuss your dog's feeding and find the meals that suit your particular dog's life stage, taste and needs. They are ready by phone, chat and email and advise on feeding, food and nutrition - and should you experience health concerns about your dog, it is your vet you should contact. If you want to see the whole selection, you can explore our dog meals and find the one that best suits your dog's everyday life.
For the vast majority of dogs, grass eating is therefore a quite ordinary and harmless habit that is part of a dog's life. As long as your dog is healthy, happy and does not react violently to it, you can calmly let it enjoy a few blades of grass on the walk. Keep an eye on whether the behaviour changes character, ensure a meaningful everyday life and a well-thought-out meal, and contact your vet if anything worries you - then you have a solid foundation for understanding and handling your dog's grass eating.