Why does my dog eat grass? Causes and when to worry

Your dog eats grass because it’s very common and, in most cases, it doesn’t mean they’re ill. Vets are asked this every day, and there isn’t a single answer. This guide is based on information from VCA animal hospitals.

Are they eating grass because they feel sick?

That’s what people usually assume: they’re making themselves sick to settle the stomach. But the studies VCA cites say fewer than 25% of dogs vomit afterwards and only 10% show signs of illness beforehand. Most grass-eaters aren’t unwell before, and don’t vomit after.

The most likely causes

• Fibre. Grass provides fibre and may help digestion and passing stools.
• Boredom, loneliness or anxiety. Nibbling grass passes the time. VCA notes that grass eating tends to rise when contact with their owner falls.
• Instinct. Their ancestors ate whole prey, including the plant matter in its stomach. Between 11% and 47% of wolves eat grass.

When to ask your vet

If they show signs of stomach discomfort, there may be a medical problem, such as reflux, inflammatory bowel disease or pancreatitis. If they eat grass urgently and vomit repeatedly, get them checked.

The real risk isn’t the grass

• Herbicides and pesticides, which can be toxic.
• Intestinal parasites, such as hookworms or roundworms, left on the grass in other dogs’ faeces. That’s why parasite prevention matters; your vet will tell you which routine to follow.

How to cut it down

• Give them more activity: more frequent walks and play.
• Give them something to do: a food-filled puzzle toy keeps them busy.
• Redirect them: when they lower their head to the grass, change direction or ask for a trick and reward it.
• Avoid areas treated with chemicals.

If they eat grass now and then and are fine, there’s no need to worry.

In Miloop you record their walks with route, distance and time, so you can see whether they’re getting the activity they need.