Hello, thanks for your question today! I am Dr. Drew, and I am a licensed veterinarian. I'll be happy to help you in any way I can.
Regardless of what claims may be made by manufacturers of products that supposedly reduce this issue,
these products are generally a waste of money since they are not effective.
Coprophagy (eating feces) is more of a behavioral issue -- meaning that you need to find a way to prevent Sawyer from having access to the litter box.
This may mean placing the litter box in a bathtub, or in a location that only the cats can get to.
Restricting Sawyer's access to the litter box is the only reliable method for reducing or preventing coprophagy.