I have a seven year old German Shepherd/Husky and still eats his poop every now and then. Then usually throws up the next day or two. My Vet tells me this is common for Shepherds? What you insight to why dogs eat their poop?
If it occurs infrequently then I would not worry about it. You can Try a multivitamin daily but I think this is a behavior problem. Forbid and Deter are sold over the counter. These products help stop this behavior. Goodluck, vetcare