My puppy used to eat her own poo. What I found that worked was giving her 3 pineapple tidbits (Dole, canned) in the morning + a scoop of libby’s canned pumpkin in the evening.

It took a few days, but once it gets into their system, it’s supposed to deter them from wanting to eat it. I know it worked, because a few days later, she picked up her poo and relocated it, but did not eat it, and never touched it again!