why do dogs roll in grass

Dogs roll in grass for several instinctual and sensory reasons. Primarily, this behavior is linked to their ancestral survival instincts—rolling in grass helps them mask their own scent to stay hidden from prey or predators. It is also a way for dogs to spread their own scent and mark territory, effectively communicating "I was here" to other animals. Additionally, dogs roll in grass simply because they enjoy the sensory experience: the cool, soft texture feels good, acts like a natural scratch or massage, and can relieve itching. Sometimes, they also roll in grass after grooming to cover scents they dislike. This behavior can be social too, as dogs may mimic others rolling or express happiness through this playful action. In summary, rolling in grass serves functions from scent masking and communication to comfort and joy.