Home › Forums › Pet Problems › Why Do Dogs Eat Grass? Tagged: dogs, eating, grass This topic contains 0 replies, has 1 voice, and was last updated by raj30498 4 months ago. Viewing 1 post (of 1 total) Author Posts January 20, 2019 at 12:26 pm #1929 raj30498Participant Veterinarians explain that there are many theories on why do dogs eat grass, amongst them are instinct, habit, PICA, nutrient deficiencies and G.I. relief. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.