Dog eating ....

You may be correct, I am basing my opinion on many years with many breeds. We have never had a dog who had this issue but as we are widely connected though showing and breeding purebred dogs, we  do encounter dogs who do have an issue with it.  Without fail the dogs we have observed have poorly digested food in their stools.  You can see the grains and sometimes undigested proteins in their waste matter.  There is no other reason for them to be there, except they passed undigested though the intestines. We are not speaking about bone fragments, but actual soft matter that should have broken down.

Dogs are scavengers, without a doubt. However when they come upon for instance, road kill, they are not interested in the entrails over the organs and bone.  That would leave the theory that they are savenging to obtain waste matter less clear.   Of course that being said dogs and horse, deer or cat pooh ( hopefully that is an okay word for the mods) is puzzling? My pack turns their noses up at wild animal scat when it comes to eating, but they like a good roll in it.

Bonita of Bwana

You may be correct, I am basing my opinion on many years with many breeds.

I'm basing my opinion on research and many decades in dogs of many different breeds.  I didn't say dogs were scavenging to find *** to eat.  I meant but didn't clarify, that dogs, being scavengers, will eat all sorts of things, including poop.  They aren't very discriminating. :)

I think a digestive issue *could* be the cause, like in the case of Pan pooping nonstop (even when I was there with him and literally catching it in the scoop so he could not eat it), and would explain why he pooped 4-5 times a day or more and was only interested in HIS own poop (maybe the food was not fully digested so his own poop was yummier?), not at all interested in frozen poop even his own, but I don't think it means the food itself is bad.  I think my dogs eat pretty well.  I don't over feed, all my dogs are very healthy, active, lean (see ribs).  I don't feed anything that contains corn, soy, wheat, gluten.  They don't always eat "grain free" but some of those foods are too rich for them.  They only eat "limited ingredient diets".  They also get raw venison when available.  So, if a digestive problem is the culprit I'd say that can happen whether the food is premium raw or ol' roy.

Bonita of Bwana

You may be correct, I am basing my opinion on many years with many breeds.

I don't know how many "many years" may be, but I too am basing my observations - I wouldn't even call it opinion, LOL - on many breeds, mixes, and everything in between. My experiences come through a wide variety of areas - the dog show world, my career as a dog trainer, my past work in boarding kennels and boarding here currently in my home, my foster work, and of course my own dogs. 

And I've seen enough non-patterns (which is as important as seeing a pattern) to believe that while there may be specific causes for some dogs, for sure (nutritional deficiency, dogs raised in dirty environments who learn to play with their poop like a toy, puppy mill dogs can have lots of issues with it, etc), there are also some dogs who just plain ole like it.  I also see many dogs who will not discriminate when it comes to what parts of a carcass they will eat (whether it's found naturally, or fed as part of a raw diet - rarely do I see a domestic dog carefully choose, normally it's a grab-whatever-I-can-from-this-lottery when it's that high value).

It's not that they are scavenging TO obtain waste matter - it's that they are scavenging, period, and waste matter falls into that category of "edible scavenging items".

 If you are letting the dogs run loose, and your poop eater goes after other dogs' poop, what about keeping him on leash until everyone goes, and you clean it up, then let him free to run? Also, that leave it command really, really wouldn't hurt either, no matter what the cause of it is.