Is eating poop a sign my dog's diet is missing something

Owners naturally look for a tidy explanation, and a missing nutrient sounds like an easy fix, but studies looking at diet and coprophagia have not found a strong or consistent link, and dogs on complete, well balanced commercial diets show the behavior about as often as dogs on other diets.

Boredom, an instinct carried over from puppyhood, attention seeking, or simple curiosity about smell all have far more evidence behind them as common drivers than any specific dietary deficiency does, which is why addressing enrichment and cleanup tends to help more than changing food.

A sudden new onset of the behavior in an adult dog, especially alongside other digestive symptoms or weight changes, is worth mentioning to a vet to rule out a digestive issue affecting how well the dog absorbs nutrients, even though a simple deficiency is an unlikely primary cause.

A range of over the counter products marketed specifically to stop poop eating by making feces taste unpleasant, or by supplying digestive enzymes, are widely available, but their actual effectiveness varies considerably from dog to dog and the evidence supporting them as a reliable universal solution is limited. Some owners do find a particular product helps their individual dog, but relying on a supplement alone, without also addressing cleanup, training, and enrichment, tends to produce inconsistent results compared with a more comprehensive management approach covering cleanup, training, and enrichment together.