Please don't let puppies eat poo if you can help it .One of my pups has been seriously ill at the vets suffering with a stomach infection caused by eating poo. It contains a bacteria which usually gives the puppie diarreah for a couple of days then they are fine but on the odd occasion it can make them seriosly ill and it can ill. We were lucky and got her to the vets in time but she was on a drip from monday to friday then under observation for another 3 days. She's fine now just neds a bit of TLC to get her back right