how to filter feed items by feed parent in views

Hi, thanks for the module.
I have got 3 different feeds on my site, and im trying to get them into 3 seperate blocks, im having a hard time working views though. The only way I can get my site to differtiate between the diffferent feed items is if I add an argument that gets the id from the url.,So when I create a block all of my feed items are in the same block.

How can I create a block that only has feed items that come from a certain feed parent?

Thanks for any help.