I think my dog is broken

[cannongal]

I hate that.
I hadn't experienced that until I pet sat a golden retriever puppy. They told me to clean the shit up right away and also gave him some canned green beans on top of his food.
I wonder if he ever out grew it.
Sorry your doggy is eating shit.

I generally try to pick their shit up right away, but we have a huge fenced in area for them,  and I don't always stay outside to watch where they poop.    :( 

Did the people you were sitting for give a reason for the green beans?   Our vet said to put a scoop of canned pumpkin on the dogs food,   it's supposed to give them extra vitamins or something like that.    We tried the pumpkin for a couple of months,   but the shithead still tried to eat his poop the whole time.