Human man beings, the kindle or top notch on the hierarchy of animal life.  They are big on health and as such do things which they consider to be healthy.  Many humans will exercise to keep fit and healthy, they will also indulge in a diet which allows them to gain their right amount of nutriments without packing on the pounds. Some human beings have even gone to a full lifestyle of being a vegetarian. That is the strict diet of plant life only. But the Good thing about the human autonomy is that it can be diverse.

​ A human who indulges in meat eating and one who indulges in leaf eating will be as healthy as the other. But the big problem is when pet owners, especially those who have cats or dogs believe that the same rule of eating strictly vegetable can apply to their canine pal. It doesn’t work that way. You see, even though all mammals basically have the same kind of organ structure, it does not mean that all mammal bodies require the same type and kind of nutriment.

Dogs are canines, they are descendants from the wolf family. Wolves are meat eaters. Their body requires that they consume meat in order to live healthy. The dog is no different. The animal requires a certain amount of meat protein to remain fit and healthy. What most dog food makers do today is that they serve what is called dry dog food. A mix of all kinds of animal flesh, grains, preservatives and a host of things your dog shouldn’t be consuming anyway. 

​Dog owners who are vegans and allow their dogs to only consume a vegan diet is basically depriving the animal of its natural protein needed to grow fit and healthy. I am sure if you let out your dog in the wild and the dog begins to adapt to its environment, you won’t see that dog eating shrub and leaves when it gets hungry. It’s natural predatorily instinct will kick in and that dog will hunt smaller meat kind to eat. But with all that said and done. What will happen to a dog that is fed a vegan diet? Well let’s see

According to Webmd:

Vitamins A and D: 
Dogs and cats cannot make vitamin D in their skin, so it needs to be in their diet. And the vitamin D needs to be D3, which comes from animal sources, not D2, which comes from plant-based sources. “People and dogs can use D2 to some extent, but cats really need D3,” Heinze says.

Taurine. 
Dogs can make taurine if provided the right building blocks through dietary protein. Cats cannot make their own taurine at all, so it is regarded as an essential amino acid in this species and must be present in adequate amounts in the diet. Both species can suffer taurine deficiencies.
 
 
Potential Risk According to WebMb

• Inadequate total protein intake (less than the 25 grams per 1,000 calories recommended)
• Imbalance of the certain amino acids, such as taurine and L-carnitine (dogs and cats) or essential fatty acids arachidonic acid (cats only), in particular
• Deficiency in vitamins and minerals (such as B vitamins, calcium, phosphorus, and iron) that are obtained ideally, or only, through meat or other animal products

If allowed to continue long enough, these dietary problems can lead to serious and sometimes irreversible medical conditions. The one veterinarians mention most often is taurine-related dilated cardiomyopathy (enlarged heart with weak contractions and poor pumping ability). Low taurine can also lead to reproductive failures, growth failures, and eye problems.
 
If You are feeding your dog vegetables and the dog is eventually becomes ill. Find the nearest vet and go save the canines life. Also, importantly is that you ensure that the animal begins to get some good meat in it's system packed with these essential nutrients below.
​Essential Nutrients for Dogs Diet.

If you ever approach your pet dog and see the animal roll on it's back, bend it's paws towards it's tummy and sticks out it's tongue, you must do these things immediately.

1. Hang up the phone. You don't need the vet to fix this, chances are if you ca,l the vet and explain these doggy symptoms, the vet may probably prescribe some kind of doggy play time medication for you. The vet simply have no treatment for this kind of dog behavior.

2. Drop Down on your Knees. If you see your dog doing what is described above. You need to immediately stop what you are doing, get down on your knees and rub your dogs chest and tummy. What you are doing is releasing the play, comfort and total relaxation energy to your dog. I can assure you, your dog will simply love you for this.

3. Drop Down and Roll on Your Back Too. There is no other way to diagnose seeking comfort and relaxation than to mimic it yourself. Get on your back and mimic the animal, both owner and pet will have a blast rolling on the ground. You may end up learning something you just never knew about canine behavior. 

4. Use your feet to Massage the underbelly.
If your dog goes on it's back and looks at you, it is a sign you need to get your foot massage on. Remove your shoe or slipper and just use your feet to gently rub the underbelly of the animal up and down. PS. Ensure you can balance your weight because your dog would hate you slipping and stepping into it's guts. 

5. Throw the dog a biscuit
If you are a lazy dog owner or simply do not have the time of day to pay attention to your dog needs, you can do the very next best thing and at least throw the dog a doggy biscuit. This will get your pooch on all fours again.