My in-laws have a dog that eats its own
That said, I like both dogs and cats. In fact we currently have a boxer and a black and white cat.
mine did this, too. pretty gross. i trained her not to anymore by pouring tabasco sauce on her crap in the backyard after she went. totally unpleasant, but necessary to teach her to stop. she'd go up to it and take a sniff, sneeze and walk away and now she isn't interested in it anymore. that was about 3-4 yrs ago when she was still a puppy.