Grass certainly doesn’t seem like a delicacy. In fact, it tastes downright terrible. (Who hasn’t tried grass sometime when they were a kid?). So why do dogs tear into it with such passion? Not much is known about why dogs eat grass, but studies indicate that it is a common and normal behavior of most domestic dogs.
It is estimated that 79% of dogs engage in plant eating behaviors, with grass being the most frequently eaten plant. Of those grass eating dogs, 86% eat grass on a daily or weekly basis. Grass eating is observed in both wolves and dogs, suggesting that the behavior was preserved through domestication and is innate (Price et al. 2009).