I have a 13-month-old Yorkie who started doing this around 5-6 months of age. We were feeding Innova puppy kibble on a schedule. I tried Forbid, then fresh pineapple (several whole pineapples, in consistent pieces as also suggested here), and then immediately putting hot sauce on it. She basically laughed at Forbid, and kept on eating the poop. She eventually ate the pineapple...and kept eating the poop. The hot sauce was even only a mild deterrent. Finally I opted to keep her confined to her ex-pen until she used the potty before/after meals. We quickly cleaned it up, and followed it with a treat. She ran from the poop to get the treat from us. Eventually, I was able to leave her pen with the potty open and she'd do her business and still run to us for the treat. I thought we had this habit kicked last fall.
Today, she started again. Argh. She's quite regular, and someone is almost always home to do a quick clean up. We just can't always catch her the second she goes. I also don't want to have to leave her in her crate every time we leave.
I will now try pumpkin and spinach. Not necessarily in that order.
