I have a big problem. Yesterday I realize that all my blogs from a blogger account (over 50) was de indexed by Google. The blogs have almost 100% original content. The problem is, I think, that many of them have one - three posts (300-700 words for each post). Blogs are niche blogs, evrey of them on particular product or subject. On every blog is the best information I found and I think they are useful for visitors. I don't have affiliate links just one unit adsense on them. One of the blogs was a subdomain of one of my sites and this one is OK. Give me ideas please! What should I do ?