Mine is just getting over this nasty habit.

I give him 2 tsp of crushed pineapple in the morning after kibble. 1 Deter at night before dinner (used it for a little over 2 weeks). AND most importantly.... practiced my Pack Leader rules according to Cesar Milan (a must). Try googling "Pack Leader Rules" and follow them to a T. Eating poo is a protection instinct passed down from wolf packs - there's a whole bunch of stuff out on the internet about it.