The wellbeing of dogs can be affected by a number of things including changes in human lifestyle, eating habits and increased stressors. Together these can lead to behavioural disorders such as fear, hyperactivity and anxiety.
The habit of dogs eating grass fits into this theory as grass is rich in dietary fiber and eating it can help improve digestion. However, dogs dont always vomit after eating grass, which might mean that there is no real connection between these two activities.
GABAs Role in Canine Calmness. GABA is an inhibitory neurotransmitter that has effects on reducing stress and anxiety. GABA helps calm the mind by relaxing the nervous system and dampening neuronal over-reactivity.

Our canine companions are very emotional. Just like humans, they can feel anxious, depressed, sad, lonely, and confused. These feelings can have a significant impact on your pet, both emotionally and physically. A local Waterdown, ON veterinarian explores canine anxiety in this post.
Canine anxiety refers to a state of distress or uneasiness experienced by a dog in response to certain triggers or situations. Like humans, dogs can experience several types of anxiety, including separation, noise, social and general anxiety.

As we can see from the illustration, Canine Anxiety Eating Habits has many fascinating aspects to explore.
Canine Anxieties and Phobias: An Amend on Break All-overs and Babble...