Why Do Dogs Eat Grass?

5. Is It in Their Genes?

Some think eating grass is a remnant of wild canid behavior. But it could be down to more than just instinct; it could be in their genetic makeup. We know that dogs are omnivorous in the wild, eating berries and grains, as well as meat. So, rather than being instinctive, it could simply be the natural thing to do. After all, based on the length of their intestines, and the fact that they are adapted to eating starchy and sugary meals, dogs could be classed as omnivores. On the flip side, their low coefficient of fermentation means they are unable to extract nutrients from plants. So, they may feel an urge to eat grass, but not get much satisfaction from it.