Rolling in the grass can help dogs mask their scent. In the wild, this behavior would be beneficial for hunting or evading predators.
Dogs have scent glands in their skin, particularly around their neck and shoulders.
Sometimes, dogs may roll in the grass as a way to alleviate an itch or irritation on their skin.
Rolling in the grass can be fun and enjoyable for dogs. They might do it simply because it feels good or as a part of their play behavior.
Rolling in the grass is a common behavior observed in pack animals. In domestic dogs.
Grass is cooler than pavement or concrete, and on hot days, dogs might roll in it to lower their body temperature and seek relief from the heat.
Grass holds a variety of scents from other animals, plants, and the environment.