Forbid has worked well, combined with digestive enzymes. Our dog is a rescue dog so came to us with the habit well established. Both were needed for her to not be so compelled to eat her poo and deter her from doing so. Fortunately she loves the taste and thinks we are preparing something really special for her; when we stir it she gets so excited for her food! We went a full 2 weeks of the initial high dose, and have been doing the maintenance dose for 2 months now. Reluctant to stop altogether. Expecting to continue the digestive enzymes thereafter.