Mostly eating grass and puking are independent. Mr Woof wants to stop and graze every time we go past an overgrown naturestrip, if it was something that caused him to vomit I’d be constantly surrounded by dog puke. I suspect the link between grass and puking is more that grass is not something that is very digestible to dogs so tends to show up whole and identifiable. It might also be something that occasionally they eat to try to settle their stomach, much like we might have a dry cracker. But just like you can’t assume everyone who sits down to cheese and biscuits is feeling nauseous most dogs are not feeling sick when they eat grass.

I agree on the benefits of a wet & dry vac. I have a little dustbuster style spot cleaner carpet shampoo thing which has been used to clean up many an accidental pet mess.