I had one dog before that constantly ate his own and others and he was perfectly healthy. We have always fed a good diet so I don't think it is from anything lacking in their diet. It tastes good going in and smells good to them when it comes out so some dogs just do it. If your pup continues to do it then yes go get some Coprophagia pills/wafers at a feed store/pet store or online like Forbid or Dis-taste to get them to stop. I used Dis-Taste from drfostersmith.com and that finally broke my poo eater. You have to give them the pills/wafers according to the instructions in order for them to work and give them to any other dogs with him also. I thought I woulld never break my poo eater from this but I treated him and the other dog in his area with these wafers everyday and it finally worked.I would not get to worried about him getting sick. I have heard that there is something lacking in their diet that causes them to eat their own feces. There is also a product called Forbid that you can sprinkle on their food that will stop them from eating their own poop. Worth a try because for sanitary purposes you don't want him eating his own poop.