Hello I am working on a niche about animals. The site is 2 month old and I put on it more than 10 interested original articles, then I did a simple linkbuilding strategy using blogspot blogs with unique content (30 < PA), then backlinks maked was not more than 12 links. All was going good and I achieved the third page, then I bought Google 1+ actions (the Google likes) to my domain (around 180). Then, in four days the domain falls into Google Sanbox (I checked the domain with the online tools to do that). Is it possible that the 1+ penalized my domain? Or is it more possible that the penalization was by linkbuilding strategy? I did that to three domains and only the domain used with the 1+ actions is in the sandbox.