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 (Cliff et al. 2008). Grass eating is observed in both wolves and dogs, suggesting that the behavior was preserved through domestication and is innate (Price et al. 2009).