If you want to add feeds for labels in your blog read this post.For easy explanation I use my blogspot url.If you have a Blogspot blog:

URL Address : http://YOURBLOG.blogspot.com/

example :- http://bloggertipandtrick.blogspot.com/

FEED Address: http://YOURBLOG.blogspot.com/feeds/posts/default

example :- http://bloggertipandtrick.blogspot.com/feeds/posts/default

LABEL Address : http://YOURBLOG.blogspot.com/search/label/labelname

example :- http://bloggertipandtrick.blogspot.com/search/label/Templates

To Add a feed for your label your, feed address should like this :

http://YOURBLOG.blogspot.com/feeds/posts/default/-/labelname

example :- http://bloggertipandtrick.blogspot.com/feeds/posts/default/-/Templates

If you have spaces in your label, your feed address should like this :

example :- http://bloggertipandtrick.blogspot.com/feeds/posts/default/-/Change%20Template

Note : If you want to show your latest post under a label follow the steps below.

1.Login to your dashboard--> layout- ->Page Elements

2.Click on 'Add a Gadget' on the sidebar.

3.Click on 'Feed' .

4.Add feed address for your label and click continue.Look at the example below.

5.Now customize your feed showing setting an click save.

Now you are done.