I have a medical tourism website which is created on SILO structure. It was working well so far with only directory submissions like Yahoo, and the other good ones. SILO makes a lot of sense in my opinion for a website not only for search engines, user friendly as well. However, after this Panda 4.1, my some important keywords lost ranking. Homepage url is still ranking at the first place which has no decent traffic though. But some other keywords gone to the second page. I have no any thin and duplicate content. However, the other websites who don't have even SEO or very limited is ranking at the top of Google.
My question is that did i get hit by Panda? Is this just temporarily losing rankings and it will back to the game? I have no any clear idea how to fix this problem if i got hit by Panda. SILO structure can cause this penalty?
Because as an example that my many keywords are in this path;
I just try to make sure what the real problem is before doing any changes which might make everything worse.