In my earlier article, I have discussed on the possible causes why our dogs are eating their own poo/faeces.
As mentioned, it is a normal and common behavior found in many dogs.
It is believed that nature increase their chance of survival in the wild by maximizing their food absorption through a secondary stage of food being processed in their bodies.
It is also a common belief that such behavior (known as Coprophagia) may be caused by dietary deficiency.
Some cures that pet owners have found to be useful in eliminating such behavior: Dietary Change

1. Change our dog's diet to one of the premium dried foods as such food tends to be processed more easily by the dog's body before being passed out.
   As a result, his faeces is less appealing.
   
2. In addition, by adding ingredients such as pineapple chunks, to aid his digestion; or sterilized bonemeal, fibre-rich treats (boiled green vegetables, bran, etc), to cause his faeces to be drier and less palatable to him.
   

Re-modifying His Behavior Although it is not harmful when our dog eats his own poo, humanly, we find such action to be disguesting and embarrassing especially in the public.
Hence, it is very normal for us, with spade in hand, to immediately rush forward to clear our dog's faeces after he has eliminated himself.
Sometimes this is accompanied by our hush reprimands to the dog who simply doesn't understand what the fuss is all about.
Very often, from his view point, we are competing with him for his faeces, and will inevitably cause him to want to beat you to it by eating his faeces faster than you can reach it.
The way to change his behavior is by making his toileting action a prelude to something more interesting than eating his own faeces.
For example, immediately after our dog has relieved himself in the yard, open the door and use his favorite toy or treats to lure him into the house.
When he comes into the house, praise him abundantly and reward him with his favorite treats and toys.
While he is enjoying himself in the house, quietly keep him indoor while you clear the yard outside.
After many of such pleasant experiences, your dog will start to look forward to the experience as soon as he relieves himself.
Over time, he will be less interested in his own waste.
There may be situations where we find our dogs are also eating wastes from other dogs in the public.
In such circumstances, we may have to resort to the use of muzzle when he is in public compounds.
In addition, we can also modify his behavior by approaching the faeces with our dog on a leash, retracting the leash and throwing a rattle can (a sealed tin can with some pebbles inside) to inhibit our dog's approach to the faeces.
Over time, our dog will learn to avoid the item.
However, it is IMPORTANT to make sure that this technique is applied before he has the chance of consuming the item.
Use of taste deterrents Some people advocate the use of taste deterrents such as tobacco sauce or chilli powder on our dog's faeces to put him off from eating it.
However, such approach may be ineffective as dogs generally have little sense of taste.
Moreover their acute sense of smell will help them to identify which faeces to avoid and which are eatable.