Seo Experts i need your opinion
 

I have about 10 blogs that dont have unique content of them.I was using sponsor rss feeds on them.
They are indexed at google but they dont have good ranking.
I added last moth unique content on them and keep posting.
I want your opinion...what is best to do?
delete all old no unique content and keep only the last good seo friendly posts?
or
Keep the old rss posts and keep posting new unique content until google loves the site again?

Shouldn't do too much harm to keep the old non-unique content unless it is all over the web. Just keep it unique from now on.

unless it's making you sales just delete the old posts and start fresh.

Just leave it alone and keep posting unique content.

delete your domains and start over.

nice tip:1orglaugh i didnt think that option