There are three different types of eating feces:
Dogs who are eating there own feces.
Dogs who are eating the feces of other dogs.
Dogs who are eating the feces of other species of animals. For instance horses, rabbits and cats.
Why Dogs Eat Poop
Like humans, dogs each have their own motives for their individual behavior. Dogs eat poop for various reasons, based on their age, their training, their living conditions and their diet. There are basically 5 different classifications, or reasons that your dog may be eating poop.
Your Dog Was Born to Eat Poop!
Before dogs were domesticated they were scavengers, living off of whatever they could find. Dogs commonly fed on the waste of other animals (and other dogs) thousands of years ago. Poop eating may just be a remnant of dog history. In certain situations, as with a newborn litter of puppies, eating poop is instinctual and completely normal. A mother with pups is wired to keep her den clean so as not to attract predators with scent cues. Thus, she quite often will clean up after her young by consuming their poop. For households with multiple dogs there is often a pecking order of dominant and submissive roles. Submissive dogs will sometimes eat the stool of their dominant counterparts.
Dogs Are “A” Students
Dogs pick up things quickly and will often learn things that you don’t want them to. For instance, consider a dog that is punished for a housebreaking accident. If he is punished by having his nose rubbed in poop (which is absolutely not a good way to deal with the problem) he may try to “dispose of the evidence” the next time around.
If you clean up after your dog while he looks on, he may misunderstand your intent and try to copy your actions in some fashion by “picking up after himself”. Your dog might also see other dogs eating poop and learn the behavior from them.
For puppies, eating feces may simply be a learning experience. Puppies learn things by putting nearly everything that comes in front of them in their mouth. Most puppies will develop a distaste for poop in fairly short order. So, if your dog is a puppy, you can relax… chances are that they will change their behavior in due time. Just make sure you keep an eye on things and try to remove waste whenever possible so that your dog doesn’t develop bad habits.
Why You Should Take Your Poop Eating Dog to the Vet
If your dog eats poop, you should make sure it’s not because of a health issue. Some dogs will start eating poop when they aren’t absorbing enough nutrients, they have parasites, or they have issues with their pancreas. All coprophagic dogs should be examined by a veterinarian
Another, rather interesting phenomenon is when multiple dogs are in the same household and one gets sick, the healthy dog will sometimes eat the feces of the unhealthy dog. This may be an instinctual reaction to hide the weaker dog from “predators” much as a mother does with pups (see the section on instinct below).
Why Your Dog Sometimes Prefers Poop to Dog Food
A dog’s digestive system is dependent on a specific mix of enzymes to break down carbohydrates, proteins and fats. There is some evidence that suggests that dog digestive systems haven’t quite caught up to modern diets that include less animal protein and far more carbohydrates and plant proteins. Some veterinary nutritionists have suggested that dogs eat stool to replenish enzymes so that they are better prepared to digest their food.
There is also evidence that dogs that aren’t getting enough of certain nutrients will resort to eating poop. A lack of vitamin B is often said to be a cause of coprophagia.
Another common theory is that overfeeding a dog can lead to coprophagia. A dog that is overfed can’t absorb all of the nutrients in his food, and thus may try to “recycle” his nutrient rich waste.
In many cases, a dog’s behavior can be linked directly to the owner’s behavior. Many dogs will eat stool simply for the attention that they get from their owner. Negative attention is still attention, and owners who scold their dogs for the behavior will quite often only reinforce it.
Dogs that are bored and lonely may play with and eat stool as a pastime. And, some dogs may resort to eating stool because they are not getting enough real food. If a dog’s living area is not kept clean, some dogs will resort to their own “housekeeping” efforts by eating stool.