If you take a look at the bottom of this page, you will see that in my Labels section (I called it Categories) that each one has its own feed icon.
If you would like to know how to have feed icons like mine, I have recently written an easy to follow tutorial to explain how.
What is especially nice about having individual feeds for your labels is that it allows your readers to subscribe just to the content they are interested in most and nothing more.
It also allows each individual author of a multi-author blog to each have their own personal feed, if you tag the posts with the author’s name.
Adding RSS Feed Icons for Labels on Blogger