There are a few reasons why dogs eat poop, my dog is always sniffing around on a walk trying to find other dog poop. Also I have a cat that is very old, always staying indoors. I use a litter tray for her, this means that if no one notices she has gone for a number 2 in the litter tray and the poop gets eaten up by my dog. The reasons for your dog eating poop could be as follows:
Natural Behavior – Many puppies will begin eating feces at an early age but will normally grow out of it but some will carry it on into later life. It is also natural for dogs to eat other species poop for example in the above my dog loves cat poop.
Hunger and or food obsession – My Labrador is always hungry even though she is always fed enough food. Like her some dogs will just eat anything and everything that looks tasty. It also may be due to a dog suffering from starvation and or malnutrition as they are just eating whatever they can find.
Not well or diseases – There is some illnesses that can cause your dog to eat poop. One disease is called Pica where it will make your dog want to eat inappropriate items and or eat it’s own poop. You need to see a vet for this one.
Lastly, a dog may eat its own poop to cover the evidence as it knows it will be told off for doing the mess in the first place