Poop eaters...gross

Poop eating, AKA, canine conspecific coprophagy.  Why does this happen?  We have four puppies, they were strays.  They are approximately 8 months old now but have always had the disgusting habit of eating poop.  No matter if they just ate their own meal, they still run and slurp it up.  It's become more like a game now, who can find it the fastest, like an easter egg hunt.  No matter me cleaning, feeding good nutrition, exercising the babies, they still love it!  Of course I have asked my veterinarian.  Apparently its behavioral and instinctual.  Mother dogs will often be seeing eating the excrement from her babies to keep the den clean.  As gross as we as humans believe it is, it's just another food source according to my vet.  Digested dog food, yuk.  Other sources have claimed it may be from a diet deficiency, however my dogs are fed and supplemented well, and it still occurs.  Boredom, or highly anxious dogs might exhibit this behavior.  Greedy eaters, those that have a drive for food, tend to be guilty of poop eating.  

What to do?  I have yet to find anything that has stopped it.  There are over the counter supplements you can give such as Forbid, FOR-BID – Coprophagia Deterrent for pets , is a powder you can add to dog food to help it taste worse to dogs.  Other options are adding crushed pineapple, cottage cheese, or papaya to the dog's food.  Definitely keeping the pooper scooper close by is a must.  Training the command such as "leave it," distraction with toys during potty breaks, anything to redirect fun correct behavior can be helpful.  Don't forget, dogs need a good toothbrush too!!