Reflecting upon diets and note that horse's faeces don't smell bad, nor do those of rabbits.
A dog's, however, doesn't smell as nice to a human nose; due perhaps to a diet higher in protein?
Personally, I am not of the vegetarian persuasion, but wonder if any of the "carrot crunchers" out there could say if their droppings smell any sweeter than those of their carniverous colleagues? Are there any vegetarian site members who have observed that friends who eat meat have smellier poo??
Never thought I would be answering a post on this subject but yes, as a vegetarian of some 20 years I can vouch for the vast improvement in poo pong and to answer the next question - yes, farts as well, worth becoming a veggie just for that benefit!