How can you stop your dog eating other dogs poo?

This is a gross, yet good question. This could be very dangerous to the dog, so it needs to be stopped. I, myself had a dog eat another dogs waste, and he was sick for days. Well pretty much pull him away from it if on a leash and scold him lightly. No need to yell at them, just in a stern voice, say "no!". If he/she is not on a leash, well then, go over to him, pull him away nicely, scold him no, without yelling at him/her, and she/he should get the message. If dog keeps on doing this, take him over to it, show him it, say "No. No eating. No." while pointing at it and your dog. Also, take him over to it, let him/her smell it, let him take a nip at it, not letting him take any, and pull him/er back and scold.