What you describe is called coprophagy, and is mentioned at the top of the second page of the download the link takes you to.
Keep it slow and steady.
Feb 01, 2011
Redfoot by: Anonymous
Red Foots eat each others Poop,while it doesn't seem normal it sometimes can help other Tort's immune systems, but never let them eat your Dogs feces, dogs and Tort's can carry bacteria's, worms and other things that can make your Tort's sick. Try to keep them separate or at least clean the area's they are in as much as possible...