You know how a person farts and then crop dusts you by walking past? Dogs kinda do that with Frito feet. They walk past you or sit near you and then all of a sudden you smell Fritos. It's for sure a thing. You don't need to smell their feet to pick up the scent.

When you're first exposed to Frito feet for the first time, you end up smelling around until you find the source, but after that no need to get close and sniff. It's not unpleasant, just kinda weird because your brain is legit looking for the open bag of Fritos.

My golden retrievers have always had them.