During my fast I felt like I had the sense of smell like that of a dog.
One time I smelled this flower scent that I knew was nearby and realized that it had always been there but had not smelled it before.
It was about forty yards away and I smelled it like it was right next to me.
I at that moment thought that that is probably what it is like for some animals with incredible sense of smell.
The downside is you can smell things that aren't so enjoyable to be smelling.