At one point or another, your dog may have eaten its own poop after going outside to relieve itself. Of course, sometimes it even goes after another dog's heap. But why do they do that?
Although it sounds gross to you and I, dogs may find this action as a way to cope with various issues.
For example, mother dogs are often seen eating poop from their pups, which can help prevent parasite and microbe spreading. This can be considered a survival trait.
A dog might even eat its own poop is to re-digest food that wasn't fully digested the first time and they want to give it another shot, or because they're not getting enough food or nutrients from their owners.
You can always question your dog's vet on the behavior and make sure they're being fed enough or getting the nutrients they need. This can help you differentiate between attention-getting behavior and an actual medical problem.
You can prevent your dog from eating its own poop by picking it up as soon as you get the chance, but unfortunately, there's not a lot you can do to prevent it.