Why Does My Dog Eat Grass? Tummy Troubles
It's a scene every owner knows: The dog dashes outside and starts frantically grazing on the lawn. Scientific Verdict: It is normal dog behavior, but the reason varies.
Reason 1: The "Self-Medication" Theory
The most popular theory is that dogs eat grass to induce vomiting.
- Mechanism: The long blades of grass tickle the throat and stomach lining.
- Goal: If they ate something weird (trash, bad food), the grass helps them purge it.
- Sign: If they gulp it down without chewing and vomit immediately after, this is the cause.
Reason 2: Nutritional Craving (Less Likely)
Some studies suggest dogs crave fiber.
- The Wolf Ancestor: Wolves ate the stomach contents of prey (which contained fermented grass/berries). Modern kibble might lack that freshness.
Reason 3: Because It Tastes Good
In the spring, fresh grass is full of sugar and moisture. Many dogs just like the crunch. If they eat it casually and don't vomit, it's just a snack.
The Danger: Chemicals
The grass isn't the problem. The RoundUp is.
- Lawn Chemicals: If you treat your lawn, you must keep your dog off it. Consuming pesticide-treated grass drastically increases cancer risk (Lymphoma).
- Parasites: Grass can carry intestinal worm eggs from other dogs' poop.
When to Worry
If your dog is eating grass frantically and NOT vomiting, or trying to vomit but nothing comes out, GO TO THE VET. This could be GDV (Bloat), which is fatal.